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

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

slsim/Deflectors/DeflectorTypes/epl_sersic.py

@@ -69,7 +69,7 @@ def light_model_lenstronomy(self, band=None):
 
     @property
     def halo_properties(self):
-        """mass density logarithmic slope
+        """Mass density logarithmic slope.
 
         :return: gamma (with =2 is isothermal)
         """