diff --git a/mercurial/patch.py b/mercurial/patch.py
--- a/mercurial/patch.py
+++ b/mercurial/patch.py
@@ -303,7 +303,7 @@ def patch(patchname, ui, strip=1, cwd=No
             # Try to be smart only if patch call was not supplied
             if util.needbinarypatch():
                 args.append('--binary')
-                
+
         if not patcher:
             raise util.Abort(_('no patch command found in hgrc or PATH'))