updated from upstream | 17/05/2022 at 10:10

1 files changed, 4 insertions, 14 deletions

diff --git a/yt_dlp/downloader/mhtml.py b/yt_dlp/downloader/mhtml.py
index 54e711792..ce2d39947 100644
--- a/yt_dlp/downloader/mhtml.py
+++ b/yt_dlp/downloader/mhtml.py
@@ -1,24 +1,14 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
 import io
 import quopri
 import re
 import uuid
 
 from .fragment import FragmentFD
-from ..utils import (
-    escapeHTML,
-    formatSeconds,
-    srt_subtitles_timecode,
-    urljoin,
-)
+from ..utils import escapeHTML, formatSeconds, srt_subtitles_timecode, urljoin
 from ..version import __version__ as YT_DLP_VERSION
 
 
 class MhtmlFD(FragmentFD):
-    FD_NAME = 'mhtml'
-
     _STYLESHEET = """\
 html, body {
     margin: 0;
@@ -62,7 +52,7 @@ body > figure > img {
     def _escape_mime(s):
         return '=?utf-8?Q?' + (b''.join(
             bytes((b,)) if b >= 0x20 else b'=%02X' % b
-            for b in quopri.encodestring(s.encode('utf-8'), header=True)
+            for b in quopri.encodestring(s.encode(), header=True)
         )).decode('us-ascii') + '?='
 
     def _gen_cid(self, i, fragment, frag_boundary):
@@ -159,7 +149,7 @@ body > figure > img {
                 length=len(stub),
                 title=self._escape_mime(title),
                 stub=stub
-            ).encode('utf-8'))
+            ).encode())
             extra_state['header_written'] = True
 
         for i, fragment in enumerate(fragments):
@@ -181,7 +171,7 @@ body > figure > img {
                 mime_type = b'image/png'
             if frag_content.startswith((b'GIF87a', b'GIF89a')):
                 mime_type = b'image/gif'
-            if frag_content.startswith(b'RIFF') and frag_content[8:12] == 'WEBP':
+            if frag_content.startswith(b'RIFF') and frag_content[8:12] == b'WEBP':
                 mime_type = b'image/webp'
 
             frag_header = io.BytesIO()