merge revision(s) 41839,41841:

	* bignum.c (biglsh_bang): Fix bignum digits under-run.

	* bignum.c (bigrsh_bang): Fix bignum digits overrun.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@41944 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 41851:

	* lib/fileutils.rb (FileUtils#chown, FileUtils#chown_R): If user
	  and group are both nil, print ":".


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@41945 b2dd03c8-39d4-4d8f-98ff-823fe69b080e