Adding W503 to ignored issues

Signed-off-by: Fabian Haase <[email protected]>

Author: FHaase

setup.cfg

@@ -31,7 +31,8 @@ exclude =
     env  # exclude asv benchmark environments from linting
 
 [flake8-rst]
-ignore = E402
+ignore = E402,  # module level import not at top of file
+         W503,  # line break before binary operator
 exclude =
     doc/source/whatsnew/*.rst
     doc/source/advanced.rst