Tiny logic tightening in core.template.loader -- taken from new-admin

    This tag may be used in two ways: ``{% extends "base" %}`` (with quotes)

    uses the literal value "base" as the name of the parent template to extend,

    or ``{% entends variable %}`` uses the value of ``variable`` as the name

    or ``{% extends variable %}`` uses the value of ``variable`` as the name

    of the parent template to extend.

    """

    bits = token.contents.split()

    if len(bits) != 2:

        raise TemplateSyntaxError, "'%s' takes one argument" % bits[0]

    parent_name, parent_name_var = None, None

    if (bits[1].startswith('"') and bits[1].endswith('"')) or (bits[1].startswith("'") and bits[1].endswith("'")):

    if bits[1][0] in ('"', "'") and bits[1][-1] == bits[1][0]:

        parent_name = bits[1][1:-1]

    else:

        parent_name_var = bits[1]