Merge pull request progit#274 from eriol/patch-1

Add missing point in first paragraph.

Author: ben

book/08-customizing-git/sections/hooks.asc

@@ -5,7 +5,7 @@
 Like many other Version Control Systems, Git has a way to fire off custom scripts when certain important actions occur.
 There are two groups of these hooks: client-side and server-side.
 Client-side hooks are triggered by operations such as committing and merging, while server-side hooks run on network operations such as receiving pushed commits.
-You can use these hooks for all sorts of reasons
+You can use these hooks for all sorts of reasons.
 
 ==== Installing a Hook