We also add a very basic yapf configuration file. Most of the changes in
this patch were performed automatically, but we broke one overly long
string into multiple components on `src/make_dbg_constants.py`.
Lines with a range were being output with text "lines", and so were
being listed after all other lines belonging to the same Bro script
(e.g., "lines 123-125" was listed after "line 492"). Fixed by using
the text "line" instead of "lines".
Line numbers with fewer digits were being listed after line numbers
with more digits (e.g., "line 85" was listed after "line 237").
Fixed by sorting on a reformatted string (this string does not appear
in the output) where line numbers are right justified (padded on left
with spaces) so that sorting produces the expected results.
