hmans/rbfu — pull request #24 by telemachus (2012-07-09 18:41:34+00:00)
Title: Add a usage message

This may seem like overkill to you, but I'll explain why I think it's worthwhile.

You lay out in the README the two basic ways to use `rbfu` - namely `rbfu` or `rbfu-env`, and you explain that each of those two commands can omit the Ruby version if there's a `.ruby-version` file present.

However, if the user calls simply `rbfu`, the error message is too brief and doesn't really cover the different ways to invoke and use `rbfu`.

I hope the current change gives a simple usage message without adding too much overhead. Thanks for considering it.