$content .= Xml::dateMenu(
( $year == null ? MWTimestamp::getLocalInstance()->format( 'Y' ) : $year ),
$month
- ) . ' ';
- $content .= $tagSelector ? ( implode( ' ', $tagSelector ) . ' ' ) : '';
+ ) . "\u{00A0}";
+ $content .= $tagSelector ? ( implode( "\u{00A0}", $tagSelector ) . "\u{00A0}" ) : '';
$content .= $checkDeleted . Html::submitButton(
$this->msg( 'historyaction-submit' )->text(),
[],