I will check all files which have not CakePHP as original author. But this one e.g. when you look into this one:
https://github.com/squizlabs/PHP_CodeSniffer/blob/master/CodeSniffer/Standards/Squiz/Sniffs/Strings/ConcatenationSpacingSniff.php
It doesn't look like the original one, and in fact it does the exact opposite.

I suppose this one doesn't count as a 'minor tweak'