Ignore broken E203

See psf#565

README.md

@@ -293,7 +293,7 @@ you are probably already using. You'd do it like this:
 max-line-length = 80
 ...
 select = C,E,F,W,B,B950
-ignore = E501,W503
+ignore = E501,W503,E203
 ```
 
 You'll find *Black*'s own .flake8 config file is configured like this.