'Construct instance docstring from the default template.'

def _construct_default_doc(self, longname=None, extradoc=None, docdict=None, discrete='continuous'):

    if (longname is None):
        longname = 'A'
    if (extradoc is None):
        extradoc = ''
    if extradoc.startswith('\n\n'):
        extradoc = extradoc[2:]
    self.__doc__ = ''.join([('%s    %s    random    variable.' % (longname, discrete)), '\n\n%(before_notes)s\n', docheaders['notes'], extradoc, '\n%(example)s'])
    self._construct_doc(docdict)
