change color of msg to green by default and only to red if msg starts with ERROR (qiita-spots#3413)

Author: sjanssen2

qiita_pet/templates/user_profile.html

@@ -19,7 +19,7 @@ <h3>User Information</h3>
         {% raw form_item(class_='form-control') %}
       </div>
       {% end %}
-      <div style="color:red;">{{msg}}</div>
+      <div style="color:{% if msg.startswith('ERROR:') %}red{% else %}darkgreen{% end %};">{{msg}}</div>
       <button type="submit" class="btn btn-success">Save Edits</button>
     </form>
   </div>