* ext/zlib/zlib.c (rb_zlib_adler32): [DOC] Add example for adler32
  Patch by Vajrasky Kok [Bug #9307] [ci skip]


git-svn-id: svn+ssh://svn.ruby-lang.org/ruby/trunk@44723 b2dd03c8-39d4-4d8f-98ff-823fe69b080e