Failed asserting that two strings are equal in a patch
It looks like the problem might have to do with HTML escape sequences for quotes, ampersands and other meta-characters (at least in part).

Compare these lines:

-  content: '/* \" \' */';\n
+  content: '/* quot  */';\n


and these:

-}"]{color:red}q[style*="quotes: none"]{quotes:none}q[style*='quotes: none']{quotes:none}q:after{content:": colon &amp; escaped double \" quotes \"."}q:after{content:' (brackets &amp; escaped single \' quotes \') '}q:after{content:"I'm Quote"}'
+}"]{color:red}q[style*="quotes: none"]{quotes:none}q[style*='quotes: none']{quotes:none}q:after{content:": colon &amp;amp; escaped double \&amp;quot; quotes \&amp;quot;."}q:after{content:' (brackets &amp;amp; escaped single \' quotes \') '}q:after{content:"I'm Quote"}'


Hopefully that sets you on the right path. Don't just look at your diff, look at the PHPUnit test to see exactly what test you are failing. Good luck!