Document how to run coverage.

diff --git a/README.mkd b/README.mkd
index 59d5ae5..d16a893 100644 (file)
--- a/README.mkd
+++ b/README.mkd
@@ -91,6 +91,11 @@ requires the unit testing library `check`.
 
     $ make test
 
+You can also see the test coverage if you have `lcov` installed and the
+`BROWSER` environment variable set to your choice of web browsers:
+
+    $ BROWSER=google-chrome-stable make coverage
+
 ## Authors
 
 Chris Peplin cpeplin@ford.com