Regexp#to_s behaves differently than MRI 1.8 or MRI 1.9
-------------------------------------------------------

                 Key: JRUBY-2683
                 URL: http://jira.codehaus.org/browse/JRUBY-2683
             Project: JRuby
          Issue Type: Bug
          Components: Core Classes/Modules
    Affects Versions: JRuby 1.1.2
         Environment: Latest JRuby
            Reporter: Vladimir Sizikov
            Assignee: Marcin Mielzynski
             Fix For: JRuby 1.1.3


JRuby fails the following rubyspec: /(?:.)/.to_s.should == "(?-mix:.)"

See also http://rubyspec.org/issues/show/24

{noformat}
mspec -t j spec/ruby/1.8/core/regexp/to_s_spec.rb
F

1)
Regexp#to_s returns a string in (?xxx:yyy) notation FAILED
Expected "(?-mix:(?:.))"
 to equal "(?-mix:.)"

/opt/work/mspec.git/lib/mspec/expectations/expectations.rb:10:in `fail_with'
/opt/work/mspec.git/lib/mspec/matchers/base.rb:9:in `=='
/opt/work/./spec/ruby/1.8/core/regexp/to_s_spec.rb:9
/opt/work/mspec.git/lib/mspec/runner/mspec.rb:124:in `instance_eval'
/opt/work/mspec.git/lib/mspec/runner/mspec.rb:124:in `protect'
/opt/work/mspec.git/lib/mspec/runner/state.rb:46:in `each'
/opt/work/mspec.git/lib/mspec/runner/state.rb:46:in `protect'
/opt/work/mspec.git/lib/mspec/runner/state.rb:60:in `process'
/opt/work/mspec.git/lib/mspec/runner/state.rb:56:in `each'
/opt/work/mspec.git/lib/mspec/runner/state.rb:56:in `process'
/opt/work/mspec.git/lib/mspec/runner/mspec.rb:28:in `describe'
/opt/work/mspec.git/lib/mspec/runner/object.rb:11:in `describe'
/opt/work/./spec/ruby/1.8/core/regexp/to_s_spec.rb:3
/opt/work/./spec/ruby/1.8/core/regexp/to_s_spec.rb:49:in `load'
/opt/work/mspec.git/lib/mspec/runner/mspec.rb:49:in `files'
/opt/work/mspec.git/lib/mspec/runner/mspec.rb:124:in `instance_eval'
/opt/work/mspec.git/lib/mspec/runner/mspec.rb:124:in `protect'
/opt/work/mspec.git/lib/mspec/runner/mspec.rb:49:in `files'
/opt/work/mspec.git/lib/mspec/runner/mspec.rb:43:in `each'
/opt/work/mspec.git/lib/mspec/runner/mspec.rb:43:in `files'
/opt/work/mspec.git/lib/mspec/runner/mspec.rb:35:in `process'
/opt/work/mspec.git/lib/mspec/commands/mspec-run.rb:76:in `run'
/opt/work/mspec.git/lib/mspec/utils/script.rb:75:in `main'
/opt/work/mspec.git/bin/mspec-run:8

Finished in 0.079000 seconds

1 file, 1 example, 5 expectations, 1 failure, 0 errors

{noformat}

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