Add flake8-bugbear, and fix issues

Author: youtux

.pre-commit-config.yaml

@@ -27,4 +27,7 @@ repos:
     rev: "7.1.1"
     hooks:
     -   id: flake8
-        additional_dependencies: ["flake8-pyproject"]
+        additional_dependencies: [
+          "flake8-pyproject",
+          "flake8-bugbear",
+        ]

src/pytest_bdd/scenario.py

@@ -51,7 +51,7 @@ def find_fixturedefs_for_step(step: Step, fixturemanager: FixtureManager, node:
     # happens to be that _arg2fixturedefs is changed during the iteration so we use a copy
     fixture_def_by_name = list(fixturemanager._arg2fixturedefs.items())
     for fixturename, fixturedefs in fixture_def_by_name:
-        for pos, fixturedef in enumerate(fixturedefs):
+        for _, fixturedef in enumerate(fixturedefs):
             step_func_context = getattr(fixturedef.func, "_pytest_bdd_step_context", None)
             if step_func_context is None:
                 continue