fix lint errors

Author: SaraPido

sigpro/aggregations/frequency/band.py

@@ -4,7 +4,9 @@
 
 
 def band_mean(amplitude_values, frequency_values, min_frequency, max_frequency):
-    """Compute the mean values for a specific band.
+    """
+    Compute the mean values for a specific band.
+
     Filter between a high and low band and compute the mean value for this specific band.
 
     Args:
@@ -31,7 +33,9 @@ def band_mean(amplitude_values, frequency_values, min_frequency, max_frequency):
 
 
 def band_rms(amplitude_values, frequency_values, min_frequency, max_frequency):
-    """Compute the rms values for a specific band.
+    """
+    Compute the rms values for a specific band.
+
     Filter between a high and low band (inclusive) and compute the rms value for this
     specific band.