This commit replaces the explicit loop and list appending in the sum_range and sum_modulus methods with list comprehensions. This makes the code more concise and readable. The sum_range method now calculates the sum using the expression sum([i for i in range(n)]), which generates a list of numbers from 0 to n and then sums them. Similarly, the sum_modulus method uses sum([i for i in range(n) if i % m == 0]), which generates a list of numbers from 0 to n that are divisible by m and then sums them. This change improves the readability and conciseness of the code while maintaining the functionality.