README: Update instructions on checking out code.

Change-Id: I64a2e107faaee09e78cf11a402de95f580fee308
Reviewed-on: https://go-review.googlesource.com/37407
Reviewed-by: Tuo Shan <shantuo@google.com>
diff --git a/README.markdown b/README.markdown
index a12976a..7194f4c 100644
--- a/README.markdown
+++ b/README.markdown
@@ -1,42 +1,44 @@
 This project is the source for http://godoc.org/
 
-[![GoDoc](https://godoc.org/github.com/golang/gddo?status.svg)](http://godoc.org/github.com/golang/gddo) [![Build Status](https://travis-ci.org/golang/gddo.svg?branch=master)](https://travis-ci.org/golang/gddo)
+[![GoDoc](https://godoc.org/github.com/golang/gddo?status.svg)](http://godoc.org/github.com/golang/gddo)
+[![Build
+Status](https://travis-ci.org/golang/gddo.svg?branch=master)](https://travis-ci.org/golang/gddo)
 
 The code in this project is designed to be used by godoc.org. Send mail to
 golang-dev@googlegroups.com if you want to discuss other uses of the code.
 
-Feedback
---------
+## Feedback
 
-Send ideas and questions to golang-dev@googlegroups.com.
-Request features and report bugs using the
-[GitHub Issue Tracker](https://github.com/golang/gddo/issues/new).
+Send ideas and questions to golang-dev@googlegroups.com. Request features and
+report bugs using the [GitHub Issue
+Tracker](https://github.com/golang/gddo/issues/new).
 
-Contributions
--------------
+## Contributions
 
-Contributions to this project are welcome, though please
-[file an issue](https://github.com/golang/gddo/issues/new).
-before starting work on anything major.
+Contributions to this project are welcome, though please [file an
+issue](https://github.com/golang/gddo/issues/new). before starting work on
+anything major.
 
 **We do not accept GitHub pull requests**
-(we use [an instance](https://go-review.googlesource.com/) of the
-[Gerrit](https://www.gerritcodereview.com/) code review system instead).
 
-To get started contributing to this project,
-clone the repository from its canonical location
+Please refer to the [Contribution
+Guidelines](https://golang.org/doc/contribute.html) on how to submit changes.
 
-	git clone https://go.googlesource.com/gddo
+We use https://go-review.googlesource.com to review change submissions.
 
-or update the `origin` of your existing clone
+## Getting the Source
 
-	git remote rm origin
-	git remote add origin https://go.googlesource.com/gddo
+To get started contributing to this project, clone the repository from its
+canonical location
 
-then read the [Contribution Guidelines](https://golang.org/doc/contribute.html)
-to learn how to send patches using Gerrit.
+```
+git clone https://go.googlesource.com/gddo $GOPATH/src/github.com/golang/gddo
+```
 
-More Documentation
-------------------
+Information on how to set up a local environment is available at
+https://github.com/golang/gddo/wiki/Development-Environment-Setup.
 
-More documentation about this project is available on the [wiki](https://github.com/golang/gddo/wiki).
+## More Documentation
+
+More documentation about this project is available on the
+[wiki](https://github.com/golang/gddo/wiki).