Refactor the code

Author: Ahmed Gad

pygad/pygad.py

@@ -569,7 +569,7 @@ def __init__(self,
                         if item and callable(item):
                             if item.__code__.co_argcount == 1:
                                 # Every callable is valid if it receives a single argument.
-                                # This argument represents the solution
+                                # This argument represents the solution.
                                 pass
                             else:
                                 self.valid_parameters = False

pygad/utils/mutation.py

@@ -352,7 +352,7 @@ def mutation_randomly(self, offspring):
         Applies the random mutation the mutation probability. For each gene, if its probability is <= that mutation probability, then it will be mutated randomly.
         It accepts a single parameter:
             -offspring: The offspring to mutate.
-        It returns an array of the mutated offspring
+        It returns an array of the mutated offspring.
         """
 
         # Random mutation changes one or more genes in each offspring randomly.