Wikimedia Bugzilla is closed!

I was puzzling over this segment of code for some time:

if ( $code != 'en' ) {
  $fallback = 'en';
} else {
  $fallback = false;
}

...wondering: "Hmm... doesn't that mean that English is the only possible
fallback language?" After all, looking at the immediately following code,
$fallback was not every set to a different value.

Then, it hit me: "Of course! This include did it:

  require( $filename );

$fallback was a variable in the actual file, so 'en' would get nicely
overwritten if necessary.

So... perhaps a short comment would help elucidate the meaning of that block for
anyone else who might have gotten confused. Patch coming.