Github has a simple web interface that makes it very easy to propose a simple change to code. You do not need to install any software or do anything beside register for a git hub account.
=== Identify a change you want to make.===
=== Click Edit to open the file===
=== Fill in any additional information in the pull request including a reference to the joomlacode issue.===
=== Click Send pull request.===
=== Make a note in the joomlacode issue with any a link to the pull request.===