Change 'ask' to 'asks'

Author: Mike-Charles

book/05-distributed-git/sections/contributing.asc

@@ -412,7 +412,7 @@ This is called a _refspec_.
 See <<_refspec>> for a more detailed discussion of Git refspecs and different things you can do with them.
 Also notice the `-u` flag; this is short for `--set-upstream`, which configures the branches for easier pushing and pulling later.
 
-Next, John e-mails Jessica to say he's pushed some changes to the `featureA` branch and ask her to verify them.
+Next, John e-mails Jessica to say he's pushed some changes to the `featureA` branch and asks her to verify them.
 She runs a `git fetch` to pull down those changes:
 
 [source,console]