Regex for Kernel.pm

Didn't notice this last night, however it's not capturing the period right before the arch, so it still fails. This should fix it (I opted for \. instead of . to match exactly, feel free to change that if you want).
![screen shot 2013-05-31 at 12 41 38 pm](https://f.cloud.github.com/assets/3308274/592375/8f4e42cc-ca19-11e2-950f-02eda214f06e.png)