merge revision(s) r44878,r44879: [Backport #9483]

	* ext/ripper/lib/ripper/lexer.rb: [DOC] use lower case version of core
	  classes when referring to return value, since we aren't directly
	  talking about the class. Patch by Jonathan Jackson [Bug #9483]

	* lib/open-uri.rb: [DOC] use lower case version of core classes, same
	  as commit r44878, based on patch by Jonathan Jackson [Bug #9483]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@44985 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) r44696: [Backport #9429]

	* lib/racc/rdoc/grammar.en.rdoc: [DOC] Correct grammar and typos
	  Patch by Giorgos Tsiftsis [Bug #9429] [ci skip]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@44986 b2dd03c8-39d4-4d8f-98ff-823fe69b080e