$wrapperAttributes = array(
'class' => 'htmlform-tip',
);
+ if ( $this->mHelpClass !== false ) {
+ $wrapperAttributes['class'] .= " {$this->mHelpClass}";
+ }
if ( $this->mHideIf ) {
$wrapperAttributes['data-hide-if'] = FormatJson::encode( $this->mHideIf );
$wrapperAttributes['class'] .= ' mw-htmlform-hide-if';