Add new line at end of githubWorkflowGenerate files

[mdedetrich]

This PR resolves #69. As can be seen, the solution is a very simple one where we just use BufferedWriter.newLine after we write the contents. The advantage here is none of the tests needed to be adjusted since the tests compare String outputs from compileWorkflow which happens before any file generated and hence the disadvantage is that this codepath is not tested since there is no existing test that makes use of githubWorkflowGenerate.

@djspiewak Do you want me to write a test for this, and if so how would you like to do it? Simplest thing I can think of is to move some code out of githubWorkflowGenerate into a function and to write a simple test that some generated files end with a new line?

[djspiewak]

I'm okay with it being an untested codepath. It's kind of a boundary condition. I do suspect though that this is going to cause the workflow checks to fail.

[mdedetrich]

I do suspect though that this is going to cause the workflow checks to fail.

Should I write a test for this then?

[djspiewak]

Should I write a test for this then?

Nah, if it was going to fail, it would have failed the scripted tests. Apparently it's fine! :-)