Added blank lines and fixed run_testing

src/fitness_function/fitness_examples.py

@@ -1,5 +1,6 @@
 class Fitness_Examples:
     """Fitness function examples used"""
+
     def is_it_5(chromosome):
         """A very simple case test function - If the chromosomes gene value is a 5 add one
          to the chromosomes overall fitness value."""
@@ -15,6 +16,7 @@ class Fitness_Examples:
                 
         return fitness
 
+
     def index_dependent_values(chromosome):
         """Test of the GA's ability to improve fitness when the value is index-dependent"""
         """If a gene is equal to its index in the chromosome + 1, fitness is incremented"""