Replace backticks with repr() or "%r"

From SF patch #852334.
diff --git a/Mac/Tools/macfreeze/macgenerate.py b/Mac/Tools/macfreeze/macgenerate.py
index 6c60605..dfa2047 100644
--- a/Mac/Tools/macfreeze/macgenerate.py
+++ b/Mac/Tools/macfreeze/macgenerate.py
@@ -4,5 +4,5 @@
 	for name in module_dict.keys():
 		print 'Include %-20s\t'%name,
 		module = module_dict[name]
-		print module.gettype(), '\t', `module`
+		print module.gettype(), '\t', repr(module)
 	return 0