Bug#1100712: diffoscope: pytest autopkgtest on s390x fails due to new src:file

[Luca Boccassi]

Source: diffoscope
Version: 289

Dear Maintainer(s),

Since the upload of file/1:5.46-2 there is a test in the pytest suite
that consistently fails on s390x:

https://qa.debian.org/excuses.php?package=file

204s tests/test_quines.py:59: 
204s _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
204s 
204s difference = <Difference filetype from file(1) -- filetype from file(1) []>
204s filename = 'quine_expected_diff'
204s 
204s     def assert_diff(difference, filename):
204s         # Assign seen and expected values to local variables to improve contextual
204s         # information in failed tests.
204s         seen = difference.unified_diff
204s         expected = get_data(filename)
204s >       assert seen == expected
204s E       AssertionError
204s 
204s difference = <Difference filetype from file(1) -- filetype from file(1) []>
204s expected   = ('@@ -1 +1 @@\n'
204s  '-gzip compressed data, was "recursive", from FAT filesystem (MS-DOS, OS/2, '
204s  'NT)\n'
204s  '+Zip archive data, made by v2.0, extract using at least v2.0, last modified, '
204s  'last modified Sun, Mar 04 2010 00:24:16, uncompressed size 440, '
204s  'method=deflate\n')
204s filename   = 'quine_expected_diff'
204s seen       = ('@@ -1 +1 @@\n'
204s  '-gzip compressed data, was "recursive", from FAT filesystem (MS-DOS, OS/2, '
204s  'NT)\n'
204s  '+Zip archive data, made by v2.0, extract using at least v2.0, last modified, '
204s  'last modified Sun, Jan 28 2030 01:00:06, uncompressed size 440, '
204s  'method=deflate\n')
204s 
204s tests/utils/data.py:64: AssertionError


I've re-run it a few times but no changes. Not sure if it's a genuine
regression or just a test case that needs updating.

This is affecting other packages such as libzstd:

https://qa.debian.org/excuses.php?package=libzstd