The PHPDoc/JSDoc updates are mostly about generic "array" types that
can be made more specific.
In PHP we can remove documentation when it is 100% identical to the
type declarations in the code.
A few mistakes are fixed as well, e.g. a missing "null".
This patch also made a major mistake visible. It looks like the
$geshi2pygments compatibility map was broken since 2018. The array was
changed from values to keys via I7a852dd and some usages updated, but
one was forgotten.
Change-Id: I480999d21f2f69cba84166bb877aa75882778966
