Misc typo in Section 12.2. Quick Start

[Hoyoung Kim]

Hello.

It seems that there is a small typo (which is not quite important)in 
Section 12.2. Quick Start.
(http://wonkity.com/~wblock/tmp/translation/po-translations-quick-start.html)

In Procedure 12.4. Generating a Translated Document:

[...] usually |article.xml|for articles or |book.xml|for articles.

I think this should be:

[...] usually |article.xml|for articles or |book.xml|for books.

BTW, the new translation system looks much easier than the oldone.
Thank you for the work!