add a missing "the" and normalize the use of periods.

[waynn]

No description provided.

[sikachu]

This is looking good. However, do you mind pushing it to http://github.com/lifo/docrails so the documentation update will get centralized? That repository has open-commit policy, so you should be able to push to their faster.

Thank you :)

[waynn]

Done! Thanks for letting me know.

[waynn]

(oh, and i assume i should close this pull request, too?)

[sikachu]

Yep, thank you for cleaning that up ;)