Test suit prints GuessedAtParserWarning

[sajith]

When running the test suite, BeautifulSoup prints these warnings:

.tox/py/lib/python2.7/site-packages/allmydata/test/test_checker.py:147:
GuessedAtParserWarning: No parser was explicitly specified, so
I'm using the best available HTML parser for this
system ("html5lib"). This usually isn't a problem, but if you run
this code on another system, or in a different virtual
environment, it may use a different parser and behave
differently.

The code that caused this warning is on line 147 of the file
.tox/py/lib/python2.7/site-packages/allmydata/test/test_checker.py. To
get rid of this warning, pass the additional argument
'features="html5lib"' to the BeautifulSoup constructor.

.tox/py/lib/python2.7/site-packages/allmydata/test/web/test_common.py:163:
GuessedAtParserWarning: No parser was explicitly specified, so
I'm using the best available HTML parser for this
system ("html5lib"). This usually isn't a problem, but if you run
this code on another system, or in a different virtual
environment, it may use a different parser and behave
differently.

The code that caused this warning is on line 163 of the file
.tox/py/lib/python2.7/site-packages/allmydata/test/web/test_common.py. To
get rid of this warning, pass the additional argument
'features="html5lib"' to the BeautifulSoup constructor.

See ​this, ​this, and ​this for examples from CI runs.

[sajith]

Affected tests:

• allmydata.test.test_checker.WebResultsRendering.test_check
• allmydata.test.test_checker.WebResultsRendering.test_check_and_repair
• allmydata.test.web.test_common.RenderExceptionTests.test_decodedurl

[sajith]

​https://github.com/tahoe-lafs/tahoe-lafs/pull/926

[GitHub <noreply@…>]

In 7458ea63/trunk:

Merge pull request #926 from sajith/3557.GuessedAtParserWarning?

Fix BeautifulSoup?'s GuessedAtParserWarning?

Fixes: ticket:3557