Add existing ruby-ruby_parser package
Update ruby-ruby_parser to version 3.2.2

Also:

* Properly quote and escape several variables.
* Add a sha256sums array.
* Remove ruby from the "depends" array. ruby-sexp_processor already depends upon
  ruby, so requiring ruby here is redundant.
* Add a license file and install it with the rest of the package. This is
  necessary because the license is MIT, and each MIT-licensed package must have
  a unique copy of that license. (technically)
* Make _gemdir a readonly variable.
* Add self as a contributor.
Update ruby-ruby_parser package

Update comments for PKGBUILD file. List self as maintainer, add a link to the
source code for the package, and explain why one of the namcap warnings is
spurious.

Add script 'test.rb'. This script contains a simple ruby unit test which checks
whether ruby_parser can perform a simple action (and thus whether the package is
correctly installed).
Update ruby-reek to version 1.3.4

Remove "ruby" from dependencies array, as listing it there is redundant.

Do not yet upload package to AUR. Package ruby-ruby_parser must first be
updated.
Add comment to ruby-reek PKGBUILD

Add comment explaining that several namcap warnings are spurious.