[ticket/12325] Automatic update should notify about outdated files

PHPBB3-12325
[ticket/12325] Fix: it's not stuck in an inifinite loop anymore

PHPBB3-12325
[ticket/12325] Don't use L_COLON

PHPBB3-12325
[ticket/12325] Fix: add a missing colon

PHPBB3-12325
[ticket/12325] Update coding style in template

PHPBB3-12325
[ticket/12325] Fix the language var name

PHPBB3-12325
Merge pull request #2493 from Nicofuma/ticket/12325

[ticket/12325] Automatic update should notify about outdated files

* Nicofuma/ticket/12325:
  [ticket/12325] Fix the language var name
  [ticket/12325] Update coding style in template
  [ticket/12325] Fix: add a missing colon
  [ticket/12325] Don't use L_COLON
  [ticket/12325] Fix: it's not stuck in an inifinite loop anymore
  [ticket/12325] Automatic update should notify about outdated files