[ruby-cvs:62629] akr:r55465 (trunk): update description about rb_cFixnum and rb_cBignum.

[akr at ruby-lang.org]

akr	2016-06-20 16:35:05 +0900 (Mon, 20 Jun 2016)

  New Revision: 55465

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=55465

  Log:
    update description about rb_cFixnum and rb_cBignum.

  Modified files:
    trunk/NEWS