Address review comments and test failures

pre_commit/commands/run.py

@@ -257,17 +257,20 @@ def run(config_file, store, args, environ=os.environ):
         for repo in repositories(config, store):
             for _, hook in repo.hooks:
                 if (
-                    (not args.hook or hook['id'] == args.hook or (
-                        hook['alias'] and hook['alias'] == args.hook
-                    )) and
-                    (not hook['stages'] or args.hook_stage in hook['stages'])
+                        (
+                            not args.hook or
+                            hook['id'] == args.hook or
+                            hook['alias'] == args.hook
+                        ) and
+                        (
+                            not hook['stages'] or
+                            args.hook_stage in hook['stages']
+                        )
                 ):
                     repo_hooks.append((repo, hook))
 
         if args.hook and not repo_hooks:
-            output.write_line(
-                'No hook with id or alias `{}`'.format(args.hook),
-            )
+            output.write_line('No hook with id `{}`'.format(args.hook))
             return 1
 
         for repo in {repo for repo, _ in repo_hooks}:

tests/repository_test.py

@@ -831,6 +831,7 @@ def test_manifest_hooks(tempdir_factory, store):
         'exclude': '^$',
         'files': '',
         'id': 'bash_hook',
+        'alias': '',
         'language': 'script',
         'language_version': 'default',
         'log_file': '',