* Added simple interpreting event parser to pegs module.
* Has side-effects problem.
* Macro solution works.
* First flat callback test works.
* Fixed namespace pollution.
* Added handler for pkChar.
* Replaced event parser test.
* Started extensive docs.
* 'callback' to 'handler' renaming part 1.
* Renaming 'callback' to 'handler' part2, completed comments.
* Fixed exported API pollution.
* Added more event handler hooks, fixed comments.
* Changed event parser addition entry.
* Fixed variable names and comments.
* Enhanced comment.
* Leave handlers are not called for an unsuccessful match.
* The three varieties of back-reference matches are processed in separate
of-clauses now.
* Improved hygiene and (almost) eliminated exports.
* Trying to fix CI test breakage by eliminating export.
* Trying to fix CI test breakage by eliminating exports.
* Re-activated leave handler code execution for unsuccessful matches.
* Eliminated the last export statement (with a funny smelling hack).
* Make sure leave handler code is executed for all unsuccessful matcher
cases.
* Replaced local unicode.`==` with export.
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