Clean up sql comment

clean_sql.py

def clean_comment(sql: str) -> str:
    lines = sql.split('\n')
    output = []
    
    for line in lines:      
        escape = False
        quote = False
        i = 0
        buffer = []
        n = len(line)
        while i < n:
            if line[i] == '\\':
                escape = not escape
            elif not escape and line[i] == "'":
                quote = not quote
            elif (not escape and not quote) and line[i: i + 2] == '--':
                break
            else:
                escape = False

            buffer.append(line[i])
            i += 1
            
        output.append(''.join(buffer))

    return '\n'.join(output)