Merge pull request #1234 from pre-commit/step_template_breakage

Fix step template breakage

azure-pipelines.yml

@@ -29,7 +29,7 @@ jobs:
     name_postfix: _latest_git
     pre_test:
     - task: UseRubyVersion@0
-    - template: step--git-install.yml
+    - template: step--git-install.yml@asottile
     - bash: |
         testing/get-swift.sh
         echo '##vso[task.prependpath]/tmp/swift/usr/bin'

pre_commit/main.py

@@ -129,7 +129,7 @@ def _adjust_args_and_chdir(args):
             'directory?',
         )
     else:
-        if toplevel == '':
+        if toplevel == '':  # pragma: no cover (old git)
             raise FatalError(
                 'git toplevel unexpectedly empty! make sure you are not '
                 'inside the `.git` directory of your repository.',