formatting

Author: Vladimir Kotal

CONTRIBUTING.md

@@ -7,7 +7,7 @@ Asking questions via creating new Issue is fine also.
 
 When submitting a new Issue for what seems is a bug, please note the versions (OpenGrok, Tomcat, Universal ctags etc.) you're running and ideally steps to reproduce.
 
-Make sure to add a comment line line to the changeset saying which Issue it is is fixing, e.g. 'fixes #XYZ' so that the issue can be automatically closed when the associated pull request is merged.
+Make sure to add a comment line line to the changeset saying which Issue it is is fixing, e.g. `fixes #XYZ` so that the issue can be automatically closed when the associated pull request is merged.
 
 Each pull request should be accompanied by a comment explaining how the change was tested, unless unit tests are provided/updated.
 Please make every effort to make most of your changes covered by tests.