python-pyepsg: autopkgtest regression in -release

[Graham Inggs]

pyeppsg's autopkgtests have regressed in -release on all architectures

This regression prevents the migration of sphinx and pytest

https://github.com/rhattersley/pyepsg/issues/15

___________________ [doctest] pyepsg.CRS.domain_of_validity ____________________
186
187 Return the domain of validity for this CRS as:
188 (west, east, south, north).
189
190 For example::
191
192 >>> print(get(21781).domain_of_validity())
UNEXPECTED EXCEPTION: ParseError('mismatched tag: line 33, column 4')
Traceback (most recent call last):

  File "/usr/lib/python3.8/doctest.py", line 1328, in __run
    exec(compile(example.source, filename, "single",

  File "<doctest pyepsg.CRS.domain_of_validity[0]>", line 1, in <module>

  File "/usr/lib/python3/dist-packages/pyepsg.py", line 204, in domain_of_validity
    gml = ET.fromstring(xml)

  File "/usr/lib/python3.8/xml/etree/ElementTree.py", line 1320, in XML
    parser.feed(text)

  File "<string>", line None

xml.etree.ElementTree.ParseError: mismatched tag: line 33, column 4

[Steve Langasek (vorlon)]

Per http://autopkgtest.ubuntu.com/packages/p/python-pyepsg , autopkgtests passing in all releases.