Distinguish between Rails code and Suspenders code

[stevepolitodesign]

It might be nice to automatically run git commit before any of the Suspenders code runs. That way it will be clear what was part of rails new, and what was part of Suspenders.

[stevepolitodesign]

I could probably just leverage the work done in #1284

[stevepolitodesign]

This was accounted for in #1337