[python-control-developers] [python-control/python-control] bdf81b: make it so rlocus does not always create a new fig...

[sawyerbfuller <no...@gi...>]

  Branch: refs/heads/master
  Home:   https://github.com/python-control/python-control
  Commit: bdf81b12ce5a4455ffb0c38f57adc27f53e7bcab
      https://github.com/python-control/python-control/commit/bdf81b12ce5a4455ffb0c38f57adc27f53e7bcab
  Author: sawyerbfuller <587...@us...>
  Date:   2020-07-11 (Sat, 11 Jul 2020)

  Changed paths:
    M control/rlocus.py
    M control/tests/rlocus_test.py

  Log Message:
  -----------
  make it so rlocus does not always create a new figure, so it is like matlab and control.sisotool (#413)

* rlocus changed to use current plotting axis rather than always creating a new figure, with an option to specify a desired matplotlib axis instead

* rlocus: add title to root locus plot axes rather than renaming figure window