Refactor fixtures in tests.

pre_commit/clientlib/validate_base.py

@@ -1,4 +1,5 @@
 from __future__ import print_function
+from __future__ import unicode_literals
 
 import argparse
 import jsonschema

pre_commit/clientlib/validate_config.py

@@ -1,3 +1,5 @@
+from __future__ import unicode_literals
+
 import sys
 
 from pre_commit.clientlib.validate_base import get_run_function

pre_commit/clientlib/validate_manifest.py

@@ -1,3 +1,5 @@
+from __future__ import unicode_literals
+
 import sys
 
 from pre_commit.clientlib.validate_base import get_run_function