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transcode-tblgen.rb: dup literal string

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* tool/transcode-tblgen.rb: get rid of modifying frozen literal
  string.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56512 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2016-10-28 14:18:50 +00:00
parent f28caf31d1
commit 1da2b2e7b9
1 changed files with 1 additions and 1 deletions
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2
tool/transcode-tblgen.rb
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@ -1031,7 +1031,7 @@ if __FILE__ == $0
VERBOSE_MODE = verbose_mode
OUTPUT_FILENAME = output_filename
OUTPUT_PREFIX = output_filename ? File.basename(output_filename)[/\A[A-Za-z0-9_]*/] : ""
OUTPUT_PREFIX = output_filename ? File.basename(output_filename)[/\A[A-Za-z0-9_]*/] : "".dup
OUTPUT_PREFIX.sub!(/\A_+/, '')
OUTPUT_PREFIX.sub!(/_*\z/, '_')