Remove unnecessary Safe tags (#3778)

templates/repo/issue/view_content/comments.tmpl

@@ -145,7 +145,7 @@
 				<img src="{{.Poster.RelAvatarLink}}">
 			</a>
 			<span class="text grey"><a href="{{.Poster.HomeLink}}">{{.Poster.Name}}</a>
-			{{$.i18n.Tr "repo.issues.delete_branch_at" .CommitSHA $createdStr | Safe}}
+			{{$.i18n.Tr "repo.issues.delete_branch_at" (.CommitSHA|Escape) $createdStr | Safe}}
 			</span>
 		</div>
     {{else if eq .Type 12}}