fix the regular expression which it would cause the warning messages

This patch should fixed the following warning messages.

/Users/watson/.emacs.d/elpa/motion-mode-20130512.2306/lib/motion/code_converter.rb:88: warning: regexp has invalid interval
/Users/watson/.emacs.d/elpa/motion-mode-20130512.2306/lib/motion/code_converter.rb:88: warning: regexp has `}' without escape
/Users/watson/.emacs.d/elpa/motion-mode-20130512.2306/lib/motion/code_converter.rb:134: warning: regexp has invalid interval
/Users/watson/.emacs.d/elpa/motion-mode-20130512.2306/lib/motion/code_converter.rb:134: warning: regexp has `}' without escape
/Users/watson/.emacs.d/elpa/motion-mode-20130512.2306/lib/motion/code_converter.rb:136: warning: regexp has invalid interval
/Users/watson/.emacs.d/elpa/motion-mode-20130512.2306/lib/motion/code_converter.rb:136: warning: regexp has `}' without escape
use "/Library/RubyMotion/bin/ruby" instead of "macruby" for flymake
Merge pull request #7 from Watson1978/flymake

use "/Library/RubyMotion/bin/ruby" instead of "macruby" for flymake
Merge pull request #6 from Watson1978/master

fix the regular expression which it would cause the warning messages