Show MediaWiki:Batchupload-summary on Special:BatchUpload

README.md

@@ -43,6 +43,9 @@ See the [SimpleBatchUpload usage documentation](https://professional.wiki/en/ext
 
 ## Customization
 
+Text on _MediaWiki:Batchupload-summary_ is shown at the top of
+_Special:BatchUpload_ and its subpages.
+
 It is possible to specify dedicated parameter sets for the upload of specific
 file types by editing the _MediaWiki:Simplebatchupload-parameters_ page. Each
 line of that page is considered as one set of parameters.

release-notes.md

@@ -43,6 +43,8 @@ Changes:
   rule wrapped in `<nowiki>` can contain `|`
 * Added a prompt before a file is uploaded over one the wiki already holds, instead of overwriting it
 * Added a prompt when files in one batch would be uploaded under the same name, instead of letting the last one win
+* Added `MediaWiki:Batchupload-summary`, shown at the top of `Special:BatchUpload`, as
+  `MediaWiki:Upload-summary` is on `Special:Upload`
 * Fixed the default upload summary being in a user's interface language rather than the wiki's content language,
   which usually also ignored a summary customised in `MediaWiki:Simplebatchupload-comment`
 

src/SpecialBatchUpload.php

@@ -59,6 +59,7 @@ protected function getGroupName() {
 	public function execute( $subpage ) {
 		$this->setHeaders();
 		$this->checkPermissions();
+		$this->outputHeader();
 
 		$this->addPageContentToOutput( $subpage );
 	}