optparse.rb: regexp at lhs

* lib/optparse.rb (OptionParser::Switch#compsys): regexp literal
  should be lhs of =~.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43891 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
version.c: EXIT_SUCCESS

* version.c (ruby_show_copyright): use EXIT_SUCCESS instead of magic
  number 0.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43892 b2dd03c8-39d4-4d8f-98ff-823fe69b080e