Format all gitignore files with shfmt

Prestashop.gitignore

@@ -71,7 +71,6 @@
 *.hot-update.js
 *.hot-update.json
 
-
 /admin-dev/autoupgrade/*
 !/admin-dev/autoupgrade/index.php
 !/admin-dev/autoupgrade/backup/index.php
@@ -170,4 +169,3 @@ themes/default-bootstrap/modules/*/mails/*
 !var/SymfonyRequirements.php
 /vendor/
 /web/bundles/
-