nobu 2018-01-26 12:41:04 +0900 (Fri, 26 Jan 2018) New Revision: 62047 https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=62047 Log: optparse.rb: froze string literals Modified files: trunk/lib/optparse.rb trunk/test/optparse/test_summary.rb