More 1.3.1 fun

The issue: update to rubygems 1.3.1 and all gem commands fail to run, outputting "The filename, directory name, or volume label syntax is incorrect."

The solution: remove two erroneous quotations inside gem.bat. There is a bug when updating to 1.3.1 on a machine with the non-default Ruby directory (C:\Ruby is default, mine is C:\Program Files\Ruby).