Dọn dẹp đoạn mã sau.
def count_vowel(str):
  vowels=['a','e','i','o','u']
  cnt=0
  for alph in str:
    if alph in vowels:
        cnt+=1
return cnt
def count_vowel(s):
    vowels = ['a', 'e', 'i', 'o', 'u']
    count = 0
    for char in s:
        if char in vowels:
            count += 1
    return count<|end_of_text|>