Merge pull request #3142 from ahardin-rh/guideline-formatting

 Minor edit to the Quick Markup Reference table

Author: ahardin-rh

contributing_to_docs/doc_guidelines.adoc

@@ -599,7 +599,7 @@ $$`GET`$$
 
 $$Answer by typing `Yes` or `No` when prompted.$$
 
-$$Use the `--amend` flag
+$$Use the `--amend` flag$$
 
 a|Use the `oc get` command to get a list of services that are currently defined.