<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def abbreviate(s, maxlength=25):
 """Color-aware abbreviator"""

    assert maxlength >= 4
    skip = False
    abbrv = None
    i = 0
    for j, c in enumerate(s):
        if c == '\033':
            skip = True
        elif skip:
            if c == 'm':
                skip = False
        else:
            i += 1

        if i == maxlength - 1:
            abbrv = s[:j] + '\033[0m...'
        elif i > maxlength:
            break

    if i <= maxlength:
        return s
    else:
        return abbrv