small style change: we should use _REGEXP as a suffix for constants instead of _REGEX so that the code is consistent and because Ruby's regular expression class is called Regexp.
(I considered keeping the old constants as deprecated constants and removing them in a later major version, but since we don't keep a CHANGELOG and we don't really do big major version releases, the result will be the same: downstream users will just be alerted that a constant they use is missing and they'll have to refer to the gem)
small style change: we should use
_REGEXPas a suffix for constants instead of_REGEXso that the code is consistent and because Ruby's regular expression class is calledRegexp.(I considered keeping the old constants as deprecated constants and removing them in a later major version, but since we don't keep a CHANGELOG and we don't really do big major version releases, the result will be the same: downstream users will just be alerted that a constant they use is missing and they'll have to refer to the gem)