human
Solve the following python programming problem given the following code:
def _highlight_line(self, line, next) : 
    start = 0 
    limit = min (len (line ['line']), len (next ['line'])) 
    while ((start < limit) and (line ['line'] [start] == next ['line'] [start])) : 
        start += 1 
end = (- 1) 
    limit -= start 
    while (((- end) <= limit) and (line ['line'] [line] == next ['line'] [end])) : 
        end -= 1 
end += 1 
    if (start or end) : 
        def do(l) : 
            last = (end + len (l ['line'])) 
            if (l ['action'] == 'add') : 
                tag = 'ins' 
else : 
                tag = 'del' 
l ['line'] = ('%s<%s>%s</%s>%s' % (l ['line'] [: start], tag, l ['line'] [start : last], tag, l ['line'] [last :])) 
do (line) 
        do (next) 

    
    

    Fix the buggy line: while (((- end) <= limit) and (line ['line'] [line] == next ['line'] [end])) :
assistant
#Here is Python code to fix the buggy line: while (((- end) <= limit) and (line ['line'] [line] == next ['line'] [end])) :
.

while (((- end) <= limit) and (line ['line'] [end] == next ['line'] [end])) :