Avoid respecifying default encoding for .encode()/.decode() calls

In Python 3, both .encode() and .decode() default the encoding to
'utf-8'. See the docs:

https://docs.python.org/3/library/stdtypes.html#str.encode
https://docs.python.org/3/library/stdtypes.html#bytes.decode

Simplify and shorten the code by using the default instead of
respecifying it.

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/test_build_html5.py b/tests/test_build_html5.py
index fc2c7e8eb..cb4290b9c 100644
--- a/tests/test_build_html5.py
+++ b/tests/test_build_html5.py
@@ -354,7 +354,7 @@ def test_html_download(app):
                     confoverrides={'html_experimental_html5_writer': True})
 def test_html_download_role(app, status, warning):
     app.build()
-    digest = md5((app.srcdir / 'dummy.dat').encode('utf-8')).hexdigest()
+    digest = md5((app.srcdir / 'dummy.dat').encode()).hexdigest()
     assert (app.outdir / '_downloads' / digest / 'dummy.dat').exists()
 
     content = (app.outdir / 'index.html').text()