[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

src/spikeinterface/preprocessing/filter.py

@@ -333,6 +333,7 @@ def __init__(self, recording, freq=3000, q=30, margin_ms=5.0, dtype=None):
 notch_filter = define_function_from_class(source_class=NotchFilterRecording, name="notch_filter")
 highpass_filter = define_function_from_class(source_class=HighpassFilterRecording, name="highpass_filter")
 
+
 def causal_filter(
     recording,
     direction="forward",
@@ -398,6 +399,7 @@ def causal_filter(
         dtype=dtype,
     )
 
+
 bandpass_filter.__doc__ = bandpass_filter.__doc__.format(_common_filter_docs)
 highpass_filter.__doc__ = highpass_filter.__doc__.format(_common_filter_docs)
 causal_filter.__doc__ = causal_filter.__doc__.format(_common_filter_docs)