[ticket/12077] Fix strict standards error.

PHPBB3-12077
[ticket/12077] Add missing space after template block name.

PHPBB3-12077
[ticket/12077] Fix another strict standards error.

PHPBB3-12077
Merge pull request #1938 from prototech/ticket/12077

[ticket/12077] Ensure that valid upload methods are presented to user in language packs page.