diff --git a/rubin_sim/maf/maf_contrib/star_counts/starcount_bymass.py b/rubin_sim/maf/maf_contrib/star_counts/starcount_bymass.py
index 74155752..d8d2e176 100644
--- a/rubin_sim/maf/maf_contrib/star_counts/starcount_bymass.py
+++ b/rubin_sim/maf/maf_contrib/star_counts/starcount_bymass.py
@@ -58,11 +58,12 @@ def noise_calc(band):
     m5 = {"u": 23.9, "g": 25.0, "r": 24.7, "i": 24.0, "z": 23.3, "y": 22.1}
     sigma = 0.03
     sigma_sys = 0.005
+
     def fun(x):
         sigma_sys**2
-        + (0.04 - gamma[band]) * 10 ** (0.4 * (x - m5[band]))
-        + gamma[band] * 10 ** (0.8 * (x - m5[band]))
-        - sigma**2
+        +(0.04 - gamma[band]) * 10 ** (0.4 * (x - m5[band]))
+        +gamma[band] * 10 ** (0.8 * (x - m5[band]))
+        -(sigma**2)
 
     return newton(fun, 25)
 
diff --git a/rubin_sim/maf/metrics/visit_groups_metric.py b/rubin_sim/maf/metrics/visit_groups_metric.py
index b1442cd2..6870d4e9 100644
--- a/rubin_sim/maf/metrics/visit_groups_metric.py
+++ b/rubin_sim/maf/metrics/visit_groups_metric.py
@@ -69,8 +69,7 @@ def run(self, data_slice, slice_point=None):
 
 
 class VisitGroupsMetric(BaseMetric):
-    """Count the number of visits per night within delta_t_min and delta_t_max.
-    """
+    """Count the number of visits per night within delta_t_min and delta_t_max."""
 
     def __init__(
         self,