'Read-only property that returns the full string representation
of ``longrepr``.
.. versionadded:: 3.0'

@property
def longreprtext(self):

    tw = py.io.TerminalWriter(stringio=True)
    tw.hasmarkup = False
    self.toterminal(tw)
    exc = tw.stringio.getvalue()
    return exc.strip()
