[ruby-cvs:62378] duerst:r55215 (trunk): * string.c: Document current situation for String#downcase. [ci skip]

[duerst at ruby-lang.org]

duerst	2016-05-30 20:00:26 +0900 (Mon, 30 May 2016)

  New Revision: 55215

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=55215

  Log:
    * string.c: Document current situation for String#downcase. [ci skip]

  Modified files:
    trunk/ChangeLog
    trunk/string.c