Logit scale nonsingular#14928

Merged

anntzer merged 4 commits intomatplotlib:masterfrom

jb-leger:logit_scale_nonsingular

Sep 10, 2019

Commits on Jul 30, 2019

LogitLocator: allows nonsingular works with no plotted values
jb-leger
committed

Commits on Jul 31, 2019

TestLogitLocator: append a test on nonsingular to avoid issues as #14743
jb-leger
committed
LogitLocator: merge two warnings in nonsingular method
jb-leger
committed

Commits on Sep 6, 2019

MNT: remove the swap_vlim dance
tacaswell
committed