Koen De Groote 3c845727f8 Replace alternating regex with character classes
This commit replaces two alternating regular expressions (that is,
regular expressions that consist of the form a|b where a and b are
characters) with the equivalent regular expression rewritten as a
character class (that is, [ab]) The reason this is an improvement is
because a|b involves backtracking while [ab] does not.

Relates #24316
2017-04-25 22:15:00 -04:00
..