[ANN] ruby_parser 3.16.0 Released

[Ryan Davis]

ruby_parser version 3.16.0 has been released!

* home: <https://github.com/seattlerb/ruby_parser>
* bugs: <https://github.com/seattlerb/ruby_parser/issues>
* rdoc: <http://docs.seattlerb.org/ruby_parser>

ruby_parser (RP) is a ruby parser written in pure ruby (utilizing
racc--which does by default use a C extension). It outputs
s-expressions which can be manipulated and converted back to ruby via
the ruby2ruby gem.

As an example:

def conditional1 arg1
return 1 if arg1 == 0
return 0
end

becomes:

s(:defn, :conditional1, s(:args, :arg1),
s(:if,
s(:call, s(:lvar, :arg1), :==, s(:lit, 0)),
s(:return, s(:lit, 1)),
nil),
s(:return, s(:lit, 0)))

Tested against 801,039 files from the latest of all rubygems (as of 2013-05):

* 1.8 parser is at 99.9739% accuracy, 3.651 sigma
* 1.9 parser is at 99.9940% accuracy, 4.013 sigma
* 2.0 parser is at 99.9939% accuracy, 4.008 sigma

Changes:

### 3.16.0 / 2021-05-15

* 1 major enhancement:

* Added tentative 3.0 support.

* 3 minor enhancements:

* Added lexing for "beginless range" (bdots).
* Added parsing for bdots.
* Updated rake compare task to download xz files, bumped versions, etc

* 4 bug fixes:

* Bump rake dependency to >= 10, < 15. (presidentbeef)
* Bump sexp_processor dependency to 4.15.1+. (pravi)
* Fixed minor state mismatch at the end of parsing to make diffing a little cleaner.
* Fixed normalizer to deal with new bison token syntax

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