Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -1,4 +1,5 @@
 # Issues, Bug Reports, and Feature Requests
+
 * When creating a new Issue, first search to see if it has already been filed.
 * Bug reports must include the following or will be deleted:
     * Steps to reproduce.
@@ -7,12 +8,13 @@
     * Notes, log files, screen captures, videos, etc. to show the problem.
 
 # Code Contributions and Pull Requests
+
 Before starting work on a pull request, please read: https://github.com/openpnp/openpnp/wiki/Developers-Guide#contributing
 
 Summary of guidelines:
 
-* One pull request per issue.
-* Describe the change and why it is needed.
+* One pull request per issue, bug or feature.
+* Describe the change in detail and why it is needed.
 * Follow the coding style.
 * Include tests and documentation.
 * Run and pass the tests.