conflict bet flake8 and black, add ignore E203

SanggyuChong · agoscinski · commit 5dc222f9614e · 2023-08-21T18:02:33.000+02:00
diff --git a/tox.ini b/tox.ini
@@ -81,3 +81,4 @@ exclude =
 per-file-ignores =
     # D205 and D400 are incompatible with the requirements of sphinx-gallery
     examples/**:D205, D400
+extend-ignore = E203
