[ruby-cvs:68932] kazu:r61751 (trunk): Fix a typo [ci skip]

[kazu at ruby-lang.org]

kazu	2018-01-10 09:01:31 +0900 (Wed, 10 Jan 2018)

  New Revision: 61751

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=61751

  Log:
    Fix a typo [ci skip]

  Modified files:
    trunk/insns.def