[ruby-cvs:68448] usa:r61267 (trunk): check the existence of specified tag

[usa at ruby-lang.org]

usa	2017-12-15 12:04:56 +0900 (Fri, 15 Dec 2017)

  New Revision: 61267

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=61267

  Log:
    check the existence of specified tag
    
    * tool/merger.rb (tag): check the existence of specified tag before tagging to
      get rid of careless mistakes.

  Modified files:
    trunk/tool/merger.rb