tests: new helper for tests with binary output

tests/repr.py

@@ -0,0 +1,11
+#!/usr/bin/env python
+#
+# Copyright 2009 Matt Mackall <[e-mail]> and others
+#
+# This software may be used and distributed according to the terms of the
+# GNU General Public License version 2, incorporated herein by reference.
+
+"""prints repr(sys.stdin) but preserves newlines in input"""
+
+import sys
+print repr(sys.stdin.read())[1:-1].replace('\\n', '\n'),