fix pep8 error

RASP_support/DrawCompFlow.py

@@ -556,7 +556,7 @@ def draw_comp_flow(self, w, filename=None,
  keep_dot=False, show=True,
  force_vertical_layers=True, add_tokens_on_ff=False):
  if w is not None:
- self.call(w)  # execute seq (and all its ancestors) on the given input
+ self.call(w) # execute seq (and all its ancestors) on the given input
  if not self.last_w == w:
  print("evaluating input failed")
  return