giving a better test name

Author: realead

asv_bench/benchmarks/hash_functions.py

@@ -5,7 +5,7 @@
 
 class IsinWithArange:
     params = [
-        [np.float64, np.int64, np.object],  #
+        [np.float64, np.int64, np.object],
         [
             1_000,
             2_000,
@@ -25,7 +25,8 @@ def time_isin(self, dtype, M, offset_factor):
         self.s.isin(self.values)
 
 
-class GH28303Example:
+class Float64GroupIndex:
+    # GH28303
     def setup(self):
         self.df = pd.date_range(
             start="1/1/2018", end="1/2/2018", periods=1e6