[3.5] bpo-29554: Improve docs for pstat module and profile. (#88) by berkerpeksag · Pull Request #228 · python/cpython

Clarify that methods take a string which is interpreted as a regex,
not a regex object.

Also clarify what the old -1, 0, 1 and 2 options were.

(cherry picked from commit 8fb1f6e)