Backport PR #18014: Fix flipped paths in non-writable config dir warning.

jklymak · meeseeksmachine · commit be996c18543b · 2020-07-22T17:55:08.000Z
diff --git a/lib/matplotlib/__init__.py b/lib/matplotlib/__init__.py
@@ -479,7 +479,7 @@ def _get_config_or_cache_dir(xdg_base):
         "recommended to set the MPLCONFIGDIR environment variable to a "
         "writable directory, in particular to speed up the import of "
         "Matplotlib and to better support multiprocessing.",
-        configdir, tmpdir)
+        tmpdir, configdir)
     return tmpdir
 
 
