Documentation: Refer to bazel test command mention

As that command was not matching the usual (and already mentioned) one.

Change-Id: I30b28e13814a0ec650c91267db03b32dbdcfd9d0

Documentation/developer-guide.md

diff --git a/Documentation/developer-guide.md b/Documentation/developer-guide.md
index 52c9192..398a2e7 100644
--- a/Documentation/developer-guide.md
+++ b/Documentation/developer-guide.md
@@ -26,7 +26,7 @@
 http://localhost:8080/ to view your local copy of gitiles, which
 will serve any repositories under `/path/to/repositories`.
 
-To run unit tests, run `bazel test ...`.
+To run unit tests, refer to the aforementioned bazel test command.
 
 
 ## Eclipse IDE