Fix a comment spacing issue.

Need a whitespace change to test plumbing.

BUG=None
TEST=None

Change-Id: Id7e7928d14956caedb941b18d0dda4eea9ad8414
Reviewed-on: https://gerrit.chromium.org/gerrit/55611
Reviewed-by: Peter Mayo <petermayo@chromium.org>
Tested-by: Peter Mayo <petermayo@chromium.org>
diff --git a/buildbot/cbuildbot_config.py b/buildbot/cbuildbot_config.py
index a3c5595..7d1833f 100755
--- a/buildbot/cbuildbot_config.py
+++ b/buildbot/cbuildbot_config.py
@@ -309,7 +309,7 @@
 # vm_tests -- Run vm test type defined in constants.
   vm_tests=constants.SIMPLE_AU_TEST_TYPE,
 
-  # A list of HWTestConfig objects to run.
+# A list of HWTestConfig objects to run.
   hw_tests=[],
 
 # upload_hw_test_artifacts -- If true, uploads artifacts for hw testing.