human
Solve the following python programming problem given the following code:
def dump(node, annotate_fields = True, include_attributes = False, indent = '  ') : 
    '
    Return a formatted dump of the tree in *node*.  This is mainly useful for
    debugging purposes.  The returned string will show the names and the values
    for fields.  This makes the code impossible to evaluate, so if evaluation is
    wanted *annotate_fields* must be set to False.  Attributes such as line
    numbers and column offsets are not dumped by default.  If this is wanted,
    *include_attributes* can be set to True.
    ' 
    def _format(node, level = 0) : 
        if isinstance (node, AST) : 
            fields = [(a, _format (b, level)) for (a, b) in iter_fields (node)] 
            if (include_attributes and node._attributes) : 
                fields.extend ([(a, _format (getattr (node, a), level)) for a in node._attributes]) 
return ''.join ([node.__class__.__name__, '(', ', '.join (((('%s=%s' % field) for field in fields) if annotate_fields else (b for (a, b) in fields))), ')']) 
else : 
            if isinstance (node, list) : 
                lines = ['['] 
                lines.extend (((((indent * (level + 2)) + _format (x, (level + 2))) + ',') for x in node)) 
                if (len (lines) > 1) : 
                    lines.append (((indent * (level + 1)) + ']')) 
else : 
                    lines [(- 1)] += ']' 
return '
'.join (lines) 
return repr (node) 
if (not isinstance (annotate_fields, AST)) : 
        raise TypeError (('expected AST, got %r' % node.__class__.__name__)) 
return _format (node) 

    
    

    Fix the buggy line: if (not isinstance (annotate_fields, AST)) :
assistant
#Here is Python program to fix the buggy line: if (not isinstance (annotate_fields, AST)) :
.

if (not isinstance (node, AST)) :