merge revision(s) 41796:

	* lib/fileutils.rb (FileUtils#chown, FileUtils#chown_R): Fix the
	  wrong output message when user is nil, which should be "chown
	  :group file" instead of "chown group file".


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@41810 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 41781: [Backport #8604]

	* lib/fileutils.rb (FileUtils#symbolic_modes_to_i): Fix the wrong
	  character class [+-=], which happened to match all desired
	  characters but also match undesired characters.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@41811 b2dd03c8-39d4-4d8f-98ff-823fe69b080e