Avoid mysterious namespace path problem
I'm still not sure what causes this problem (or more pertinently, what
makes this problem *not* happen for me and others), but this should work
around it regardless.
@@ -1114,7 +1114,7 @@ def _load_plugins(config):
# Extend the `beetsplug` package to include the plugin paths.
import beetsplug
- beetsplug.__path__ = paths + beetsplug.__path__
+ beetsplug.__path__ = paths + list(beetsplug.__path__)
# For backwards compatibility, also support plugin paths that
# *contain* a `beetsplug` package.
