Show raw phpcs errors when executable could not run #7
Description
When encountering an error via the phpcs executable, currently the tool returns:
Unable to run phpcs executable.
Which is executed here: https://github.com/olivertappin/phpcs-diff/blob/master/src/PhpcsDiff.php#L144
Whereas the real error could be something like:
ERROR: the "ruleset.xml" coding standard is not installed. The installed coding standards are PEAR, MySource, Squiz, PSR2, Zend, PSR12 and PSR1
Which can be difficult to find.
The suggestion here would be to change this functionality and have the raw error returned to the user, so they're able to see what's going on.