Print on requirements.txt failure
diff --git a/pre_commit_hooks/requirements_txt_fixer.py b/pre_commit_hooks/requirements_txt_fixer.py
index a794c5d..2dec6bf 100644
--- a/pre_commit_hooks/requirements_txt_fixer.py
+++ b/pre_commit_hooks/requirements_txt_fixer.py
@@ -74,6 +74,11 @@
 
     for arg in args.filenames:
         with open(arg, 'rb+') as file_obj:
-            retv |= fix_requirements(file_obj)
+            ret_for_file = fix_requirements(file_obj)
+
+            if ret_for_file:
+                print('Sorting {0}'.format(arg))
+
+            retv |= ret_for_file
 
     return retv