pytester: avoid confusing x self parameter

Author: bluetech

src/_pytest/pytester.py

@@ -1116,7 +1116,8 @@ def inline_run(
  rec = []
 
  class Collect:
- def pytest_configure(x, config: Config) -> None:
+ @staticmethod
+ def pytest_configure(config: Config) -> None:
  rec.append(self.make_hook_recorder(config.pluginmanager))
 
  plugins.append(Collect())