This commit only changes whitespace and removes a temporary comment.

I'm using 500 as a file size limit, and 15 as an include limit.
This affects comparatively few files, but I think they are the worst
ones.

Closes ticket 31175.

Instead of excluding directories at the last minute if they happen
to appear in our filenames, we exclude them early, before recursing
into all their subdirectories.

Part of 29746.

This helps ensure that we'll get output in a stable order.

Closes ticket 29882.

George Kadianakis authored Mar 05, 2019 and Nick Mathewson committed Mar 13, 2019

This was causing issues because the exceptions file is written using Posix
paths, whereas practracker in Windows was trying to match Windows paths ("\"
instead of "/").

George Kadianakis authored Feb 28, 2019 and Nick Mathewson committed Mar 13, 2019

- Introduce 'make check-best-practices'.
- Fix up Tor topdir etc to work with the way 'make check-local' gets called.
- Make practracker less likely to print useless stuff.