fix linter errors

mathgenerator/__init__.py

@@ -10,9 +10,9 @@ import scipy
 genList = []
 
 SEP = os.sep
+
+
 class Generator:
-
-
     def __init__(self, title, id, func, kwargs):
         self.title = title
         self.id = id

mathgenerator/funcs/geometry/surface_area_pyramid.py

@@ -12,6 +12,7 @@ _PYTHAGOREAN = [(3, 4, 5),
 
                 (7, 24, 25)]
 
+
 def gen_func(unit='m', format='string'):
     # Generate first triplet
     height, half_width, triangle_height_1 = random.sample(random.choice(_PYTHAGOREAN), 3)