Merge pull request #370 from rmzelle/patch-1

Edit paragraph in 2-contributing.asc (06-github)

Author: ben

book/06-github/sections/2-contributing.asc

@@ -117,7 +117,8 @@ You can alternatively go to the ``Branches'' page at `https://github.com/<user>/
 image::images/blink-02-pr.png[Pull Request button]
 
 (((GitHub, pull requests)))
-If we click that green button, we'll see a screen that allows us to create a title and description for the change we would like to request so the project owner has a good reason to consider it. It is generally a good idea to spend some effort making this description as useful as possible so the author knows why this is being suggested and why it would be a valuable change for them to accept.
+If we click that green button, we'll see a screen that asks us to give our Pull Request a title and description.
+It is almost always worthwhile to put some effort into this, since a good description helps the owner of the original project determine what you were trying to do, whether your proposed changes are correct, and whether accepting the changes would improve the original project.
 
 We also see a list of the commits in our topic branch that are ``ahead'' of the `master` branch (in this case, just the one) and a unified diff of all the changes that will be made should this branch get merged by the project owner.