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

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

mesa/experimental/measure.py

@@ -1,5 +1,6 @@
 from collections import defaultdict
 
+
 class Group:
     def __init__(self, model, fn):
         self.model = model
@@ -9,6 +10,7 @@ def __init__(self, model, fn):
     def value(self):
         return self.fn(self.model)
 
+
 class Measure:
     def __init__(self, group, measurer):
         self.group = group
@@ -26,7 +28,7 @@ def value(self):
         group_object = self.group
         if isinstance(self.group, Group):
             group_object = self.group.value
-        return self._measure_group(group_object, self.measurer) 
+        return self._measure_group(group_object, self.measurer)
 
 
 class DataCollector:
@@ -66,6 +68,7 @@ def run():
             model.step()
             datacollector.collect()
     """
+
     def __init__(self, model, attributes):
         self.model = model
         self.attributes = attributes