In PHP 8.1 the default $flags argument to htmlspecialchars() has changed
from ENT_COMPAT to ENT_QUOTES | ENT_SUBSTITUTE | ENT_HTML401. This
breaks some tests.
I changed all the calls that break unit tests, and some others
based on a quick code review. A lot of callers just use the default for
convenience, and were already over-quoting, so the default should still
be good enough for them.
Change-Id: Ie9fbeae6f0417c6cf29dceaf429243a135f9fecb
This helps phan to detect unreachable code and also impossible types
after the functions.
It helps phan to avoid false positives for array keys
when the keys are checked before
Bug: T240141
Change-Id: I895f70e82b3053a46cd44135b15437e6f82a07b2
