Refactoring the clean function

clean.py

# After
def clean(i_list):
    """
    Generate a string from a list stripped all the extra whitespace
    """
    r_list = [string.strip() for string in i_list]

    return ' '.join(r_list)

# Before
def clean(i_list):
    r_list = []
    for x in i_list:
        pattern = re.compile(r'\s+')
        x = re.sub(pattern, ' ', x)
        x = x.strip()
        r_list.append(x)

    return ' '.join(r_list)