From c92789100c1e57176921913af1969201c0ca385f Mon Sep 17 00:00:00 2001
From: Robert Wolff <mahlzahn@posteo.de>
Date: Mon, 13 Jan 2025 11:51:00 +0100
Subject: [PATCH] Remove automatic alt text in markdown image rendering

---
 modules/markup/html.go                   |  6 ---
 modules/markup/html_test.go              | 26 +++++-----
 modules/markup/markdown/markdown_test.go | 60 ++++++++++++------------
 modules/templates/util_render_test.go    |  4 +-
 4 files changed, 45 insertions(+), 51 deletions(-)

diff --git a/modules/markup/html.go b/modules/markup/html.go
index 3355c021ce..ca9857d2bf 100644
--- a/modules/markup/html.go
+++ b/modules/markup/html.go
@@ -759,9 +759,6 @@ func shortLinkProcessor(ctx *RenderContext, node *html.Node) {
 				title = path.Base(name)
 			}
 			alt := props["alt"]
-			if alt == "" {
-				alt = name
-			}
 
 			// make the childNode an image - if we can, we also place the alt
 			childNode.Type = html.ElementNode
@@ -772,9 +769,6 @@ func shortLinkProcessor(ctx *RenderContext, node *html.Node) {
 				{Key: "title", Val: title},
 				{Key: "alt", Val: alt},
 			}
-			if alt == "" {
-				childNode.Attr = childNode.Attr[:2]
-			}
 		} else {
 			if !absoluteLink {
 				if ctx.IsWiki {
diff --git a/modules/markup/html_test.go b/modules/markup/html_test.go
index 05ba321548..6c00c5e7c8 100644
--- a/modules/markup/html_test.go
+++ b/modules/markup/html_test.go
@@ -416,7 +416,7 @@ func TestRender_ShortLinks(t *testing.T) {
 	otherImgurlWiki := util.URLJoin(markup.TestRepoURL, "wiki", "raw", "Link+Other.jpg")
 	encodedImgurlWiki := util.URLJoin(markup.TestRepoURL, "wiki", "raw", "Link+%23.jpg")
 	notencodedImgurlWiki := util.URLJoin(markup.TestRepoURL, "wiki", "raw", "some", "path", "Link+#.jpg")
-	favicon := "http://google.com/favicon.ico"
+	favicon := "https://forgejo.org/favicon.ico"
 
 	test(
 		"[[Link]]",
@@ -424,28 +424,28 @@ func TestRender_ShortLinks(t *testing.T) {
 		`<p><a href="`+urlWiki+`" rel="nofollow">Link</a></p>`)
 	test(
 		"[[Link.jpg]]",
-		`<p><a href="`+imgurl+`" rel="nofollow"><img src="`+imgurl+`" title="Link.jpg" alt="Link.jpg"/></a></p>`,
-		`<p><a href="`+imgurlWiki+`" rel="nofollow"><img src="`+imgurlWiki+`" title="Link.jpg" alt="Link.jpg"/></a></p>`)
+		`<p><a href="`+imgurl+`" rel="nofollow"><img src="`+imgurl+`" title="Link.jpg" alt=""/></a></p>`,
+		`<p><a href="`+imgurlWiki+`" rel="nofollow"><img src="`+imgurlWiki+`" title="Link.jpg" alt=""/></a></p>`)
 	test(
 		"[["+favicon+"]]",
-		`<p><a href="`+favicon+`" rel="nofollow"><img src="`+favicon+`" title="favicon.ico" alt="`+favicon+`"/></a></p>`,
-		`<p><a href="`+favicon+`" rel="nofollow"><img src="`+favicon+`" title="favicon.ico" alt="`+favicon+`"/></a></p>`)
+		`<p><a href="`+favicon+`" rel="nofollow"><img src="`+favicon+`" title="favicon.ico" alt=""/></a></p>`,
+		`<p><a href="`+favicon+`" rel="nofollow"><img src="`+favicon+`" title="favicon.ico" alt=""/></a></p>`)
 	test(
 		"[[Name|Link]]",
 		`<p><a href="`+url+`" rel="nofollow">Name</a></p>`,
 		`<p><a href="`+urlWiki+`" rel="nofollow">Name</a></p>`)
 	test(
 		"[[Name|Link.jpg]]",
-		`<p><a href="`+imgurl+`" rel="nofollow"><img src="`+imgurl+`" title="Name" alt="Name"/></a></p>`,
-		`<p><a href="`+imgurlWiki+`" rel="nofollow"><img src="`+imgurlWiki+`" title="Name" alt="Name"/></a></p>`)
+		`<p><a href="`+imgurl+`" rel="nofollow"><img src="`+imgurl+`" title="Name" alt=""/></a></p>`,
+		`<p><a href="`+imgurlWiki+`" rel="nofollow"><img src="`+imgurlWiki+`" title="Name" alt=""/></a></p>`)
 	test(
 		"[[Name|Link.jpg|alt=AltName]]",
 		`<p><a href="`+imgurl+`" rel="nofollow"><img src="`+imgurl+`" title="AltName" alt="AltName"/></a></p>`,
 		`<p><a href="`+imgurlWiki+`" rel="nofollow"><img src="`+imgurlWiki+`" title="AltName" alt="AltName"/></a></p>`)
 	test(
 		"[[Name|Link.jpg|title=Title]]",
-		`<p><a href="`+imgurl+`" rel="nofollow"><img src="`+imgurl+`" title="Title" alt="Title"/></a></p>`,
-		`<p><a href="`+imgurlWiki+`" rel="nofollow"><img src="`+imgurlWiki+`" title="Title" alt="Title"/></a></p>`)
+		`<p><a href="`+imgurl+`" rel="nofollow"><img src="`+imgurl+`" title="Title" alt=""/></a></p>`,
+		`<p><a href="`+imgurlWiki+`" rel="nofollow"><img src="`+imgurlWiki+`" title="Title" alt=""/></a></p>`)
 	test(
 		"[[Name|Link.jpg|alt=AltName|title=Title]]",
 		`<p><a href="`+imgurl+`" rel="nofollow"><img src="`+imgurl+`" title="Title" alt="AltName"/></a></p>`,
@@ -472,16 +472,16 @@ func TestRender_ShortLinks(t *testing.T) {
 		`<p><a href="`+urlWiki+`" rel="nofollow">Link</a> <a href="`+otherURLWiki+`" rel="nofollow">Other Link</a> <a href="`+encodedURLWiki+`" rel="nofollow">Link?</a></p>`)
 	test(
 		"[[Link #.jpg]]",
-		`<p><a href="`+encodedImgurl+`" rel="nofollow"><img src="`+encodedImgurl+`" title="Link #.jpg" alt="Link #.jpg"/></a></p>`,
-		`<p><a href="`+encodedImgurlWiki+`" rel="nofollow"><img src="`+encodedImgurlWiki+`" title="Link #.jpg" alt="Link #.jpg"/></a></p>`)
+		`<p><a href="`+encodedImgurl+`" rel="nofollow"><img src="`+encodedImgurl+`" title="Link #.jpg" alt=""/></a></p>`,
+		`<p><a href="`+encodedImgurlWiki+`" rel="nofollow"><img src="`+encodedImgurlWiki+`" title="Link #.jpg" alt=""/></a></p>`)
 	test(
 		"[[Name|Link #.jpg|alt=\"AltName\"|title='Title']]",
 		`<p><a href="`+encodedImgurl+`" rel="nofollow"><img src="`+encodedImgurl+`" title="Title" alt="AltName"/></a></p>`,
 		`<p><a href="`+encodedImgurlWiki+`" rel="nofollow"><img src="`+encodedImgurlWiki+`" title="Title" alt="AltName"/></a></p>`)
 	test(
 		"[[some/path/Link #.jpg]]",
-		`<p><a href="`+notencodedImgurl+`" rel="nofollow"><img src="`+notencodedImgurl+`" title="Link #.jpg" alt="some/path/Link #.jpg"/></a></p>`,
-		`<p><a href="`+notencodedImgurlWiki+`" rel="nofollow"><img src="`+notencodedImgurlWiki+`" title="Link #.jpg" alt="some/path/Link #.jpg"/></a></p>`)
+		`<p><a href="`+notencodedImgurl+`" rel="nofollow"><img src="`+notencodedImgurl+`" title="Link #.jpg" alt=""/></a></p>`,
+		`<p><a href="`+notencodedImgurlWiki+`" rel="nofollow"><img src="`+notencodedImgurlWiki+`" title="Link #.jpg" alt=""/></a></p>`)
 	test(
 		"<p><a href=\"https://example.org\">[[foobar]]</a></p>",
 		`<p><a href="https://example.org" rel="nofollow">[[foobar]]</a></p>`,
diff --git a/modules/markup/markdown/markdown_test.go b/modules/markup/markdown/markdown_test.go
index 4c9ab42806..e64ab6a6f4 100644
--- a/modules/markup/markdown/markdown_test.go
+++ b/modules/markup/markdown/markdown_test.go
@@ -108,7 +108,7 @@ func TestRender_Images(t *testing.T) {
 
 	test(
 		"[["+title+"|"+url+"]]",
-		`<p><a href="`+result+`" rel="nofollow"><img src="`+result+`" title="`+title+`" alt="`+title+`"/></a></p>`)
+		`<p><a href="`+result+`" rel="nofollow"><img src="`+result+`" title="`+title+`" alt=""/></a></p>`)
 	test(
 		"[!["+title+"]("+url+")]("+href+")",
 		`<p><a href="`+href+`" rel="nofollow"><img src="`+result+`" alt="`+title+`"/></a></p>`)
@@ -119,7 +119,7 @@ func TestRender_Images(t *testing.T) {
 
 	test(
 		"[["+title+"|"+url+"]]",
-		`<p><a href="`+result+`" rel="nofollow"><img src="`+result+`" title="`+title+`" alt="`+title+`"/></a></p>`)
+		`<p><a href="`+result+`" rel="nofollow"><img src="`+result+`" title="`+title+`" alt=""/></a></p>`)
 	test(
 		"[!["+title+"]("+url+")]("+href+")",
 		`<p><a href="`+href+`" rel="nofollow"><img src="`+result+`" alt="`+title+`"/></a></p>`)
@@ -149,13 +149,13 @@ func testAnswers(baseURLContent, baseURLImages string) []string {
 <table>
 <thead>
 <tr>
-<th><a href="` + baseURLImages + `/images/icon-install.png" rel="nofollow"><img src="` + baseURLImages + `/images/icon-install.png" title="icon-install.png" alt="images/icon-install.png"/></a></th>
+<th><a href="` + baseURLImages + `/images/icon-install.png" rel="nofollow"><img src="` + baseURLImages + `/images/icon-install.png" title="icon-install.png" alt=""/></a></th>
 <th><a href="` + baseURLContent + `/Installation" rel="nofollow">Installation</a></th>
 </tr>
 </thead>
 <tbody>
 <tr>
-<td><a href="` + baseURLImages + `/images/icon-usage.png" rel="nofollow"><img src="` + baseURLImages + `/images/icon-usage.png" title="icon-usage.png" alt="images/icon-usage.png"/></a></td>
+<td><a href="` + baseURLImages + `/images/icon-usage.png" rel="nofollow"><img src="` + baseURLImages + `/images/icon-usage.png" title="icon-usage.png" alt=""/></a></td>
 <td><a href="` + baseURLContent + `/Usage" rel="nofollow">Usage</a></td>
 </tr>
 </tbody>
@@ -164,9 +164,9 @@ func testAnswers(baseURLContent, baseURLImages string) []string {
 		`<p><a href="http://www.excelsiorjet.com/" rel="nofollow">Excelsior JET</a> allows you to create native executables for Windows, Linux and Mac OS X.</p>
 <ol>
 <li><a href="https://github.com/libgdx/libgdx/wiki/Gradle-on-the-Commandline#packaging-for-the-desktop" rel="nofollow">Package your libGDX application</a><br/>
-<a href="` + baseURLImages + `/images/1.png" rel="nofollow"><img src="` + baseURLImages + `/images/1.png" title="1.png" alt="images/1.png"/></a></li>
+<a href="` + baseURLImages + `/images/1.png" rel="nofollow"><img src="` + baseURLImages + `/images/1.png" title="1.png" alt=""/></a></li>
 <li>Perform a test run by hitting the Run! button.<br/>
-<a href="` + baseURLImages + `/images/2.png" rel="nofollow"><img src="` + baseURLImages + `/images/2.png" title="2.png" alt="images/2.png"/></a></li>
+<a href="` + baseURLImages + `/images/2.png" rel="nofollow"><img src="` + baseURLImages + `/images/2.png" title="2.png" alt=""/></a></li>
 </ol>
 <h2 id="user-content-custom-id">More tests</h2>
 <p>(from <a href="https://www.markdownguide.org/extended-syntax/" rel="nofollow">https://www.markdownguide.org/extended-syntax/</a>)</p>
@@ -849,8 +849,8 @@ mail@domain.com
 <a href="/path/file" target="_blank" rel="nofollow noopener"><img src="/path/file" alt="local image"/></a><br/>
 <a href="/path/file" target="_blank" rel="nofollow noopener"><img src="/path/file" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
-<a href="/image.jpg" rel="nofollow"><img src="/image.jpg" title="local image" alt="local image"/></a><br/>
-<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
+<a href="/image.jpg" rel="nofollow"><img src="/image.jpg" title="local image" alt=""/></a><br/>
+<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt=""/></a><br/>
 <a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
 <a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
@@ -876,8 +876,8 @@ space</p>
 <a href="/wiki/raw/path/file" target="_blank" rel="nofollow noopener"><img src="/wiki/raw/path/file" alt="local image"/></a><br/>
 <a href="/wiki/raw/path/file" target="_blank" rel="nofollow noopener"><img src="/wiki/raw/path/file" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
-<a href="/wiki/raw/image.jpg" rel="nofollow"><img src="/wiki/raw/image.jpg" title="local image" alt="local image"/></a><br/>
-<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
+<a href="/wiki/raw/image.jpg" rel="nofollow"><img src="/wiki/raw/image.jpg" title="local image" alt=""/></a><br/>
+<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt=""/></a><br/>
 <a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
 <a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
@@ -905,8 +905,8 @@ space</p>
 <a href="https://gitea.io/path/file" target="_blank" rel="nofollow noopener"><img src="https://gitea.io/path/file" alt="local image"/></a><br/>
 <a href="https://gitea.io/path/file" target="_blank" rel="nofollow noopener"><img src="https://gitea.io/path/file" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
-<a href="https://gitea.io/image.jpg" rel="nofollow"><img src="https://gitea.io/image.jpg" title="local image" alt="local image"/></a><br/>
-<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
+<a href="https://gitea.io/image.jpg" rel="nofollow"><img src="https://gitea.io/image.jpg" title="local image" alt=""/></a><br/>
+<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt=""/></a><br/>
 <a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
 <a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
@@ -934,8 +934,8 @@ space</p>
 <a href="https://gitea.io/wiki/raw/path/file" target="_blank" rel="nofollow noopener"><img src="https://gitea.io/wiki/raw/path/file" alt="local image"/></a><br/>
 <a href="https://gitea.io/wiki/raw/path/file" target="_blank" rel="nofollow noopener"><img src="https://gitea.io/wiki/raw/path/file" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
-<a href="https://gitea.io/wiki/raw/image.jpg" rel="nofollow"><img src="https://gitea.io/wiki/raw/image.jpg" title="local image" alt="local image"/></a><br/>
-<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
+<a href="https://gitea.io/wiki/raw/image.jpg" rel="nofollow"><img src="https://gitea.io/wiki/raw/image.jpg" title="local image" alt=""/></a><br/>
+<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt=""/></a><br/>
 <a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
 <a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
@@ -963,8 +963,8 @@ space</p>
 <a href="/relative/path/path/file" target="_blank" rel="nofollow noopener"><img src="/relative/path/path/file" alt="local image"/></a><br/>
 <a href="/relative/path/path/file" target="_blank" rel="nofollow noopener"><img src="/relative/path/path/file" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
-<a href="/relative/path/image.jpg" rel="nofollow"><img src="/relative/path/image.jpg" title="local image" alt="local image"/></a><br/>
-<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
+<a href="/relative/path/image.jpg" rel="nofollow"><img src="/relative/path/image.jpg" title="local image" alt=""/></a><br/>
+<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt=""/></a><br/>
 <a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
 <a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
@@ -992,8 +992,8 @@ space</p>
 <a href="/relative/path/wiki/raw/path/file" target="_blank" rel="nofollow noopener"><img src="/relative/path/wiki/raw/path/file" alt="local image"/></a><br/>
 <a href="/relative/path/wiki/raw/path/file" target="_blank" rel="nofollow noopener"><img src="/relative/path/wiki/raw/path/file" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
-<a href="/relative/path/wiki/raw/image.jpg" rel="nofollow"><img src="/relative/path/wiki/raw/image.jpg" title="local image" alt="local image"/></a><br/>
-<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
+<a href="/relative/path/wiki/raw/image.jpg" rel="nofollow"><img src="/relative/path/wiki/raw/image.jpg" title="local image" alt=""/></a><br/>
+<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt=""/></a><br/>
 <a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
 <a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
@@ -1022,8 +1022,8 @@ space</p>
 <a href="/user/repo/media/branch/main/path/file" target="_blank" rel="nofollow noopener"><img src="/user/repo/media/branch/main/path/file" alt="local image"/></a><br/>
 <a href="/user/repo/media/branch/main/path/file" target="_blank" rel="nofollow noopener"><img src="/user/repo/media/branch/main/path/file" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
-<a href="/user/repo/media/branch/main/image.jpg" rel="nofollow"><img src="/user/repo/media/branch/main/image.jpg" title="local image" alt="local image"/></a><br/>
-<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
+<a href="/user/repo/media/branch/main/image.jpg" rel="nofollow"><img src="/user/repo/media/branch/main/image.jpg" title="local image" alt=""/></a><br/>
+<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt=""/></a><br/>
 <a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
 <a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
@@ -1052,8 +1052,8 @@ space</p>
 <a href="/relative/path/wiki/raw/path/file" target="_blank" rel="nofollow noopener"><img src="/relative/path/wiki/raw/path/file" alt="local image"/></a><br/>
 <a href="/relative/path/wiki/raw/path/file" target="_blank" rel="nofollow noopener"><img src="/relative/path/wiki/raw/path/file" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
-<a href="/relative/path/wiki/raw/image.jpg" rel="nofollow"><img src="/relative/path/wiki/raw/image.jpg" title="local image" alt="local image"/></a><br/>
-<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
+<a href="/relative/path/wiki/raw/image.jpg" rel="nofollow"><img src="/relative/path/wiki/raw/image.jpg" title="local image" alt=""/></a><br/>
+<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt=""/></a><br/>
 <a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
 <a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
@@ -1082,8 +1082,8 @@ space</p>
 <a href="/user/repo/path/file" target="_blank" rel="nofollow noopener"><img src="/user/repo/path/file" alt="local image"/></a><br/>
 <a href="/user/repo/path/file" target="_blank" rel="nofollow noopener"><img src="/user/repo/path/file" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
-<a href="/user/repo/image.jpg" rel="nofollow"><img src="/user/repo/image.jpg" title="local image" alt="local image"/></a><br/>
-<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
+<a href="/user/repo/image.jpg" rel="nofollow"><img src="/user/repo/image.jpg" title="local image" alt=""/></a><br/>
+<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt=""/></a><br/>
 <a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
 <a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
@@ -1112,8 +1112,8 @@ space</p>
 <a href="/relative/path/wiki/raw/path/file" target="_blank" rel="nofollow noopener"><img src="/relative/path/wiki/raw/path/file" alt="local image"/></a><br/>
 <a href="/relative/path/wiki/raw/path/file" target="_blank" rel="nofollow noopener"><img src="/relative/path/wiki/raw/path/file" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
-<a href="/relative/path/wiki/raw/image.jpg" rel="nofollow"><img src="/relative/path/wiki/raw/image.jpg" title="local image" alt="local image"/></a><br/>
-<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
+<a href="/relative/path/wiki/raw/image.jpg" rel="nofollow"><img src="/relative/path/wiki/raw/image.jpg" title="local image" alt=""/></a><br/>
+<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt=""/></a><br/>
 <a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
 <a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
@@ -1143,8 +1143,8 @@ space</p>
 <a href="/user/repo/media/branch/main/sub/folder/path/file" target="_blank" rel="nofollow noopener"><img src="/user/repo/media/branch/main/sub/folder/path/file" alt="local image"/></a><br/>
 <a href="/user/repo/media/branch/main/sub/folder/path/file" target="_blank" rel="nofollow noopener"><img src="/user/repo/media/branch/main/sub/folder/path/file" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
-<a href="/user/repo/media/branch/main/sub/folder/image.jpg" rel="nofollow"><img src="/user/repo/media/branch/main/sub/folder/image.jpg" title="local image" alt="local image"/></a><br/>
-<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
+<a href="/user/repo/media/branch/main/sub/folder/image.jpg" rel="nofollow"><img src="/user/repo/media/branch/main/sub/folder/image.jpg" title="local image" alt=""/></a><br/>
+<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt=""/></a><br/>
 <a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
 <a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
@@ -1174,8 +1174,8 @@ space</p>
 <a href="/relative/path/wiki/raw/path/file" target="_blank" rel="nofollow noopener"><img src="/relative/path/wiki/raw/path/file" alt="local image"/></a><br/>
 <a href="/relative/path/wiki/raw/path/file" target="_blank" rel="nofollow noopener"><img src="/relative/path/wiki/raw/path/file" alt="local image"/></a><br/>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a><br/>
-<a href="/relative/path/wiki/raw/image.jpg" rel="nofollow"><img src="/relative/path/wiki/raw/image.jpg" title="local image" alt="local image"/></a><br/>
-<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a><br/>
+<a href="/relative/path/wiki/raw/image.jpg" rel="nofollow"><img src="/relative/path/wiki/raw/image.jpg" title="local image" alt=""/></a><br/>
+<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt=""/></a><br/>
 <a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow">https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash</a><br/>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare<br/>
 <a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow">https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb</a><br/>
diff --git a/modules/templates/util_render_test.go b/modules/templates/util_render_test.go
index 3479d94039..028cd2ba76 100644
--- a/modules/templates/util_render_test.go
+++ b/modules/templates/util_render_test.go
@@ -194,8 +194,8 @@ func TestRenderMarkdownToHtml(t *testing.T) {
 <a href="https://example.com" rel="nofollow">remote link</a>
 <a href="/image.jpg" target="_blank" rel="nofollow noopener"><img src="/image.jpg" alt="local image"/></a>
 <a href="https://example.com/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://example.com/image.jpg" alt="remote image"/></a>
-<a href="/image.jpg" rel="nofollow"><img src="/image.jpg" title="local image" alt="local image"/></a>
-<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt="remote link"/></a>
+<a href="/image.jpg" rel="nofollow"><img src="/image.jpg" title="local image" alt=""/></a>
+<a href="https://example.com/image.jpg" rel="nofollow"><img src="https://example.com/image.jpg" title="remote link" alt=""/></a>
 <a href="https://example.com/user/repo/compare/88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb#hash" rel="nofollow"><code>88fc37a3c0...12fc37a3c0 (hash)</code></a>
 com 88fc37a3c0a4dda553bdcfc80c178a58247f42fb...12fc37a3c0a4dda553bdcfc80c178a58247f42fb pare
 <a href="https://example.com/user/repo/commit/88fc37a3c0a4dda553bdcfc80c178a58247f42fb" rel="nofollow"><code>88fc37a3c0</code></a>