merge revision(s) 39369:

	* numeric.c: Examples and formatting for Numeric and Float
	  Based on a patch by Zach Morek and Oren K of newhaven.rb
	  [Github documenting-ruby/ruby#5]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@39658 b2dd03c8-39d4-4d8f-98ff-823fe69b080e