fix hljs unintenionally highlighting commit links (#7244)

* fix hljs unintenionally highlighting commit links

* fix unit tests

modules/markup/html.go

@@ -323,6 +323,7 @@ func createCodeLink(href, content string) *html.Node {
 	code := &html.Node{
 		Type: html.ElementNode,
 		Data: atom.Code.String(),
+		Attr: []html.Attribute{{Key: "class", Val: "nohighlight"}},
 	}
 
 	code.AppendChild(text)

modules/markup/html_internal_test.go

@@ -197,13 +197,13 @@ func TestRender_AutoLink(t *testing.T) {
 
 	// render valid commit URLs
 	tmp := util.URLJoin(AppSubURL, "commit", "d8a994ef243349f321568f9e36d5c3f444b99cae")
-	test(tmp, "<a href=\""+tmp+"\"><code>d8a994ef24</code></a>")
+	test(tmp, "<a href=\""+tmp+"\"><code class=\"nohighlight\">d8a994ef24</code></a>")
 	tmp += "#diff-2"
-	test(tmp, "<a href=\""+tmp+"\"><code>d8a994ef24 (diff-2)</code></a>")
+	test(tmp, "<a href=\""+tmp+"\"><code class=\"nohighlight\">d8a994ef24 (diff-2)</code></a>")
 
 	// render other commit URLs
-	tmp = "https://external-link.gogs.io/gogs/gogs/commit/d8a994ef243349f321568f9e36d5c3f444b99cae#diff-2"
+	tmp = "https://external-link.gitea.io/go-gitea/gitea/commit/d8a994ef243349f321568f9e36d5c3f444b99cae#diff-2"
-	test(tmp, "<a href=\""+tmp+"\"><code>d8a994ef24 (diff-2)</code></a>")
+	test(tmp, "<a href=\""+tmp+"\"><code class=\"nohighlight\">d8a994ef24 (diff-2)</code></a>")
 }
 
 func TestRender_FullIssueURLs(t *testing.T) {