allert-error does not exist, update javadoc to allert-danger
@@ -68,7 +68,7 @@ import org.kohsuke.stapler.interceptor.RequirePOST;
* If {@link #isActivated()} returns true, Jenkins will use the {@code message.jelly}
* view of this object to render the warning text. This happens in the
* {@code http://SERVER/jenkins/manage} page. This view should typically render
- * a DIV box with class='alert alert-error' or class='alert alert-warning' with a human-readable text
+ * a DIV box with class='alert alert-danger' or class='alert alert-warning' with a human-readable text
* inside it. It often also contains a link to a page that provides more details
* about the problem.
* </dd>
