diff --git a/src/xfel_calibrate/calibrate.py b/src/xfel_calibrate/calibrate.py
index 4068a07b66bfc13128dfcf01dc7d57a58a740ef8..bba98fc0b78e09b428d500c99a9bef9cf9d9e296 100755
--- a/src/xfel_calibrate/calibrate.py
+++ b/src/xfel_calibrate/calibrate.py
@@ -452,7 +452,6 @@ def add_args_from_nb(nb, parser, cvar=None, no_required=False):
     parms = extract_parameters(nb, lang='python')
 
     for p in parms:
-
         helpstr = ("Default: %(default)s" if not p.comment
                    else "{}. Default: %(default)s".format(p.comment.replace("#", " ").strip()))
         required = (p.comment is not None