Re: [WARNING] Proposed future changes that are backward incompatible

There's one more change that was suggested that I'd like to propose:
- Make "git grep" search the whole repository by default; include an
  explicit "." path limiter to search only the current directory.

In addition to being more consistent with other commands like "git log",
this saves a lot of typing working in drivers/net/usb/ if the identifier
you're looking for is in include/.  Typing the additional space-dot
is pretty trivial if you want the current directory only.