[ruby-cvs:65068] naruse:r57902 (ruby_2_4): merge revision(s) 57539: [Backport #11752]

[naruse at ruby-lang.org]

naruse	2017-03-12 17:01:46 +0900 (Sun, 12 Mar 2017)

  New Revision: 57902

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=57902

  Log:
    merge revision(s) 57539: [Backport #11752]
    
    rational.c: fix rdoc [ci skip]
    
    * rational.c (rb_rational_plus): [DOC] fix an example.
      A patch by Trygve Flathen <at.ruby-lang AT flathen.net> in
      [ruby-core:71755].  [Bug #11752]

  Modified directories:
    branches/ruby_2_4/
  Modified files:
    branches/ruby_2_4/rational.c
    branches/ruby_2_4/version.h