* Per https://www.mediawiki.org/wiki/Manual:Hooks/GetPreferences, it is
strict on $preferences being an array, so type hinted it to conform.
* Remove legacy hook behavior for onResourceLoaderTestModules() hook in
CodeMirrorHooks. See: https://w.wiki/3Az for more information. Also,
added `@see` with link to the documentation of the hook used.
Change-Id: I0a2fac4b4d491abf8d2f661be32bf2e0d791c90b
Documentation here: [[mw:Manual:Hooks/BeforePageDisplay]] also
says so about objects passed by defaults as references, no need
for the &.
Also, fixed onResourceLoaderTestModules() function header for the
$rl parameter, removed the & symbol and updated this hook's docs
here: [[mw:Manual:Hooks/ResourceLoaderTestModules]].
Change-Id: Ifdabc47a1a4f02aec4906edb800d360ca4febd76
This was used for backward compatibility after beta support was removed
by MaxSem in I1ad451acfd163c783e7b (T185030). As a todo, this backcompat
was planned to be removed in 2019 :).
Bug: T219342
Change-Id: I35c77add8b4815a26b1bea2df90eaeae05a9a9f7
