can't ignore words with numbers?

[d-morrison]

Currently (using commit 81cb940 or CRAN v2.3.0), 95th gets flagged as the mis-spelled word th:

Adding 95th to WORDLIST doesn't succeed in ignoring this string, but it doesn't seem optimal to add th to the wordlist, since it might be a mis-spelling of the. Do you have a recommendation to handle this type of situation?

Thanks!

[jmbarbone]

@d-morrison , I think this is #45

There's a pending PR (#67) which you can test out.