_get_electric_current: improve doc

nxtomomill/converter/hdf5/acquisition/baseacquisition.py

@@ -494,11 +494,12 @@ class BaseAcquisition:
                 except (ValueError, KeyError):
                     pass
                 else:
-                    # handle special case: elec_current is sometime a list and sometime a number...
+                    # handle case where elec_current is a scalar. Cast it to list before return
                     if isinstance(elec_current, numpy.number):
                         elec_current = [
                             elec_current,
                         ]
+
                     return elec_current, unit
             else:
                 _logger.warning(