Make comment better.

cdist/exec/local.py

@@ -254,7 +254,7 @@ class Local(object):
                     "Cannot delete old cache %s: %s" % (destination, e))
 
         shutil.move(self.base_path, destination)
-        # add target_host since cache dir is hash-ed target_host
+        # add target_host since cache dir can be hash-ed target_host
         host_cache_path = os.path.join(destination, "target_host")
         with open(host_cache_path, 'w') as hostf:
             print(self.target_host[0], file=hostf)