human
I wrote the below code

    def callbinrepr(op, left, right):
        'Call    the    pytest_assertrepr_compare    hook    and    prepare    the    result\n\n                                This    uses    the    first    result    from    the    hook    and    then    ensures    the\n                                following:\n                                *    Overly    verbose    explanations    are    truncated    unless    configured    otherwise\n                                        (eg.    if    running    in    verbose    mode).\n                                *    Embedded    newlines    are    escaped    to    help    util.format_explanation()\n                                        later.\n                                *    If    the    rewrite    mode    is    used    embedded    %-characters    are    replaced\n                                        to    protect    later    %    formatting.\n\n                                The    result    can    be    formatted    by    util.format_explanation()    for\n                                pretty    printing.\n                                '
        hook_result = item.ihook.pytest_assertrepr_compare(config=item.config, op=op, left=left, right=right)
        for new_expl in hook_result:
            if new_expl:
                new_expl = truncate.truncate_if_required(new_expl, item)
                new_expl = [line.replace('\n', '\\n') for line in new_expl]
                res = py.builtin._totext('\n~').join(new_expl)
                if (item.config.getvalue('assertmode') == 'rewrite'):
                    res = res.replace('%', '%%')
                return res
    util._reprcompare = callbinrepr

What's a good function header?
 Give me a Python program to compare    hook    and    prepare    the    result\n\n                                This    uses    the    first    result    from    the    hook    and    then    ensures    the\n                                following:\n                                *    Overly    verbose    explanations    are    truncated    unless    configured    otherwise\n                                        (eg?
assistant
#Here is Python program to compare    hook    and    prepare    the    result\n\n                                This    uses    the    first    result    from    the    hook    and    then    ensures    the\n                                following:\n                                *    Overly    verbose    explanations    are    truncated    unless    configured    otherwise\n                                        (eg.

def pytest_runtest_setup(item):