Return a long version and installation specifier string of the form:

        If :py:attr:`~.git_str` == '':

            SHORT_STR

        otherwise:

            SHORT_STR (GIT_STR)

        Where ``SHORT_STR`` is :py:attr:`~.short_str` and ``GIT_STR`` is
        :py:attr:`~.git_str`.

        :return: long version/installation specifier string
        :rtype: str

def long_str(self):
        """
        Return a long version and installation specifier string of the form:

        If :py:attr:`~.git_str` == '':

            SHORT_STR

        otherwise:

            SHORT_STR (GIT_STR)

        Where ``SHORT_STR`` is :py:attr:`~.short_str` and ``GIT_STR`` is
        :py:attr:`~.git_str`.

        :return: long version/installation specifier string
        :rtype: str
        """
        gs = self.git_str
        if gs == '':
            return self.short_str
        return self.short_str + ' (' + gs + ')'