[vim] fix html in ex substitute confirm

Author: benhormann

keymap/vim.js

@@ -5353,7 +5353,7 @@
         return;
       }
       showPrompt(cm, {
-        prefix: 'replace with <strong>' + replaceWith + '</strong> (y/n/a/q/l)',
+        prefix: dom('span', 'replace with ', dom('strong', replaceWith), ' (y/n/a/q/l)'),
         onKeyDown: onPromptKeyDown
       });
     }