Merge pull request #46 from asottile/all-repos_autofix_show-missing

Remove --show-missing when it is set in .coveragerc

tox.ini

@@ -9,7 +9,7 @@ passenv = HOMEPATH
 commands =
     coverage erase
     coverage run -m pytest {posargs:tests}
-    coverage report --show-missing --fail-under 100
+    coverage report --fail-under 100
     pre-commit install -f --install-hooks
     pre-commit run --all-files