fix: linter errors over operators.py [no ci]

src/operators.py

@@ -42,6 +42,6 @@ def multiplication(x, y):
 #   returns None if the divisor is zero
 #   the result might be of float type
 def division(x, y):
-    if y==0:
+    if y == 0:
         return None
     return x/y