properly formulate path in command to MacOS Chrome executable

[sdondley]

This patch gets all tests to pass on a Mac without warnings.

[Corion]

Thanks!

That commit added an editor tempfile, but I've adjusted the .gitignore file so these shouldn't get added anymore in the future.

I like to use

git commit -p

to select and review the things that get added, because I too often forget to remove stuff :)

[sdondley]

Good to know. I did do git diff before running git add . but that obviously isn't going to report new files that aren't in the repository yet.