The file extensions/README[1] only contains links to SVN, but it should point to Git.

Besides, it seems better to use an "https" to [[mw:Category:Extensions]].

[1] https://gerrit.wikimedia.org/r/gitweb?p=mediawiki/core.git;a=blame;f=extensions/README;h=ca1558553683dadf410914f033a61c633c94e75c;hb=HEAD

Version: unspecified
Severity: normal