patches PryBackend to throw unterminated string and unexpected end-of-file syntax errors
patches PryBackend to throw unterminated string and unexpected end-of-file syntax errors

zalt50/iruby,SciRuby/iruby,SciRuby/iruby,zalt50/iruby,zalt50/iruby,zalt50/iruby,SciRuby/iruby,SciRuby/iruby