support escape character for white space in running single test case with option -t or -f

[debuggingfuture]

in case of having test cases like exports['test case']

I am not able to use either -f or -t nodeunit tc.js -t 'test case' as space is delimiter and it looks for folder instead Error: ENOENT, stat '/Users/xxxxx/test/case'

Please let me know if there is existing options to escape , and please support \ as espace char white space. quite trivial but I think helpful.Thanks.