Development coding rules

This is just a remind for people looking for development coding rules:
You may find a lot of information on this page: https://wiki.dolibarr.org/index.php/Language_and_development_rules

Yesterday, a new rule has been added into the coding style checker: The PHPCheckstyle rule “Squiz.ControlStructures.ControlSignature.SpaceAfterKeyword” is now enabled.
This change is done having in mind to have a more standardized code and to reach the PSR12 rules (A lot of rules were added and fixed in v11 and v12, we continue in this direction).

It means you must now also follow this development standard when making your code or you will get a travis error on your PR.
So now use

} elseif () {

instead of

}
elseif ()
{