Don't update matplotlibrc at all if editable_mode

Author: ianthomas23

setup.py

@@ -216,9 +216,9 @@ def update_matplotlibrc(path):
 class BuildPy(setuptools.command.build_py.build_py):
     def run(self):
         super().run()
-        base_dir = "lib" if self.editable_mode else self.build_lib
-        update_matplotlibrc(
-            Path(base_dir, "matplotlib/mpl-data/matplotlibrc"))
+        if not self.editable_mode:
+            update_matplotlibrc(
+                Path(self.build_lib, "matplotlib/mpl-data/matplotlibrc"))
 
 
 class Sdist(setuptools.command.sdist.sdist):