How to submit changes with a GitHub Pull Request (was Re: CI system for PR builds)

[Craig Treleaven]

> On Apr 12, 2018, at 1:35 PM, db <iamsudo at gmail.com> wrote:
> 
> On 12 Apr 2018, at 14:27, Mojca Miklavec <mojca at macports.org> wrote:
>> What nobody mentioned so far is that one can also simply click "Edit" on the existing Portfile on GitHub interface and that will also open a pull request.
> 
> Interesting. It seems that 'Create new file' would have a similar effect. 'Upload files' is disabled though.
> 
> "You’re creating a file in a project you don’t have write access to. Submitting a change will create the file in a new branch in your fork USER/macports-ports, so you can send a pull request."

Is there a playground somewhere to try out such features?  For those of us that are somewhat git- and github-challenged.

Craig