Reformat i18n correctly (#2976)

* Ignore i18n gen.dir key

* Add a makefile target to update an i18n key

* Mark some i18n keys to ignore

* Reformat i18n files correctly

* Make i18n keys sort case-sensitive

Calling `make i18n-format` was always inverting 4 lines:

- gen.date.dec with gen.date.Dec
- and gen.date.nov with gen.date.Nov

I don't know why these particular lines and not the others, but it
appeared the sort function was case insensitive due to the
`SORT_FLAG_CASE` flag passed to the `ksort` function. Removing this flag
makes the calls to the formatter idempotent and more reliable.

Unfortunately it moves a lot of lines since the `_` character is
considered differently.

* Check i18n files are correctly formatted on Travis

1 files changed, 2 insertions, 2 deletions

diff --git a/app/i18n/it/index.php b/app/i18n/it/index.php
index ec9f8546f..5db251806 100644
--- a/app/i18n/it/index.php
+++ b/app/i18n/it/index.php
@@ -2,6 +2,7 @@
 
 return array(
 	'about' => array(
+		'_' => 'Informazioni',
 		'agpl3' => '<a href="https://www.gnu.org/licenses/agpl-3.0.html">AGPL 3</a>',	// TODO - Translation
 		'bugs_reports' => 'Bugs',
 		'credits' => 'Crediti',
@@ -13,7 +14,6 @@ return array(
 		'title' => 'Informazioni',
 		'version' => 'Versione',
 		'website' => 'Sito',
-		'_' => 'Informazioni',
 	),
 	'feed' => array(
 		'add' => 'Aggiungi un Feed RSS',
@@ -24,10 +24,10 @@ return array(
 		'title_global' => 'Vista globale per categorie',
 	),
 	'log' => array(
+		'_' => 'Logs',	// TODO - Translation
 		'clear' => 'Svuota logs',
 		'empty' => 'File di log vuoto',
 		'title' => 'Logs',	// TODO - Translation
-		'_' => 'Logs',	// TODO - Translation
 	),
 	'menu' => array(
 		'about' => 'Informazioni',