human
Solve the following python programming problem given the following code:
def _decorate_with_warning(func, wtype, message, docstring_header = None) : 
    'Wrap a function with a warnings.warn and augmented docstring.' 
    message = _sanitize_restructured_text (message) 
    @ decorator 
    def warned(fn, * args, **kwargs) : 
        warnings.warn (message, wtype, stacklevel = 3) 
        return fn (* args, ** kwargs) 
doc = (((func.__doc__ is not None) and func.__doc__) or '') 
    if (docstring_header is not None) : 
        docstring_header %= dict (func = doc.__name__) 
        doc = inject_docstring_text (doc, docstring_header, 1) 
decorated = warned (func) 
    decorated.__doc__ = doc 
    return decorated 

    
    

    Fix the buggy line: docstring_header %= dict (func = doc.__name__)
assistant
#Here is Python code to fix the buggy line: docstring_header %= dict (func = doc.

docstring_header %= dict (func = func.__name__)