[ruby-cvs:68450] usa:r61269 (trunk): add `removetag` command

[usa at ruby-lang.org]

usa	2017-12-15 12:22:51 +0900 (Fri, 15 Dec 2017)

  New Revision: 61269

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=61269

  Log:
    add `removetag` command
    
    * tool/merger.rb (remove_tag): add `removetag` command.

  Modified files:
    trunk/tool/merger.rb