Fix some Markdown formatting issues

Address miscellaneous issues with Markdown formatting in comments which
are consumed by shocco when generating the online documentation.

Change-Id: I953075cdbddbf1f119c6c7e35f039e2e54b79078
diff --git a/lib/trove b/lib/trove
index 0a19d03..c40006b 100644
--- a/lib/trove
+++ b/lib/trove
@@ -181,6 +181,7 @@
 # Restore xtrace
 $XTRACE
 
-# Local variables:
-# mode: shell-script
-# End:
+# Tell emacs to use shell-script-mode
+## Local variables:
+## mode: shell-script
+## End: