bugfix - remove % in attributes' comments

Author: Thinh Nguyen

element_array_ephys/ephys_acute.py

@@ -706,7 +706,7 @@ class Waveform(dj.Part):
         pt_ratio=null: float  # absolute amplitude of peak divided by absolute amplitude of trough relative to 0
         repolarization_slope=null: float  # the repolarization slope was defined by fitting a regression line to the first 30us from trough to peak
         recovery_slope=null: float  # the recovery slope was defined by fitting a regression line to the first 30us from peak to tail
-        spread=null: float  # (um) the range with amplitude above 12% of the maximum amplitude along the probe
+        spread=null: float  # (um) the range with amplitude above 12-percent of the maximum amplitude along the probe
         velocity_above=null: float  # (s/m) inverse velocity of waveform propagation from the soma toward the top of the probe
         velocity_below=null: float  # (s/m) inverse velocity of waveform propagation from the soma toward the bottom of the probe
         """

element_array_ephys/ephys_chronic.py

@@ -705,7 +705,7 @@ class Waveform(dj.Part):
         pt_ratio=null: float  # absolute amplitude of peak divided by absolute amplitude of trough relative to 0
         repolarization_slope=null: float  # the repolarization slope was defined by fitting a regression line to the first 30us from trough to peak
         recovery_slope=null: float  # the recovery slope was defined by fitting a regression line to the first 30us from peak to tail
-        spread=null: float  # (um) the range with amplitude above 12% of the maximum amplitude along the probe
+        spread=null: float  # (um) the range with amplitude above 12-percent of the maximum amplitude along the probe
         velocity_above=null: float  # (s/m) inverse velocity of waveform propagation from the soma toward the top of the probe
         velocity_below=null: float  # (s/m) inverse velocity of waveform propagation from the soma toward the bottom of the probe
         """