Template:MW file

Usage
Displays an informative box about a file in MediaWiki core, with links to its source code in master, stable, and legacy branches, and links to its classes and interfaces in the generated PHP documentation.

FILENAME is the name of the file, including extension. If the file has been recently renamed, you can use the   and the   parameters to provide the old name so links work; you'll need to update the template invocation as the release in which the file was renamed moves from master->stable->legacy. PATH is the path to the file; do not include a leading slash, include the trailing slash. Leave it blank for files in the root directory. The class arguments are all optional, and if supplied will link to the generated documentation. CLASS should be the class name, as used in the URL. E.g. "Parser" would generate a link to "classParser.html". The template allows up to six class parameters, - INTERFACE is similar. The template allows up to three interface parameters The  argument is optional and should only be used if the file is not in Special:MyLanguage/Git for some reason (I think this only applies to LocalSettings.php). REASON is the reason that is displayed in the infobox. Note that is case sensitive!

Be careful not to include spaces on either side of the |PATH|FILE|CLASS parameters.

The manual>Special:MyLanguage/Manual:Contents|Manual uses this template extensively.