Rubocop

@kevgo 

Custom cops:
* EmptyLines - otherwise the 2 spacing between functions and the 2/4 functions
* LineLength - 15 over 100, 38 over 80
* ParameterLists - create_local_commit has 6
I think the old version reads better:

```ruby
returning_to_current_branch do
  # check out another branch
end
```