[ruby-cvs:72566] ko1:r65466 (trunk): remove '//' style comments.

[ko1 at ruby-lang.org]

ko1	2018-10-31 11:39:08 +0900 (Wed, 31 Oct 2018)

  New Revision: 65466

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=65466

  Log:
    remove '//' style comments.
    
    * variable.c (obj_ivar_set): remove '//' style comments pointed out by the
      following build log: https://travis-ci.org/ruby/ruby/jobs/448551951

  Modified files:
    trunk/variable.c