pycompat: update comment about unnamedtempfile
I found the comment clearer. I end up having to think about this for
`TemporaryFile` and I update that one in the process.
Differential Revision: https://phab.mercurial-scm.org/D9210
--- a/mercurial/pycompat.py Tue Sep 08 18:16:24 2020 +0900
+++ b/mercurial/pycompat.py Wed Oct 14 21:47:14 2020 +0200
@@ -506,7 +506,8 @@
return tempfile.mkstemp(suffix, prefix, dir)
-# mode must include 'b'ytes as encoding= is not supported
+# NamedTemporaryFile does not support an "encoding=" argument on python2.
+# This wrapper file are always open in byte mode.
def namedtempfile(
mode=b'w+b', bufsize=-1, suffix=b'', prefix=b'tmp', dir=None, delete=True
):