fi ligature makes Definitive Guide a wonky title

The **ﬁnitive** in "Jenkins: The Deﬁnitive Guide" seems whack like so:

![definitiveguide](https://f.cloud.github.com/assets/743877/1259233/c4c43f2c-2bdc-11e3-8c57-e631f9fd902c.png)

Might have been the **fi** ligature, but in any case, it shunts the leading.