[safari] Use postdata_urlencode (#7465)

youtube_dl/extractor/safari.py

@@ -6,12 +6,12 @@ import re
 from .common import InfoExtractor
 from .brightcove import BrightcoveLegacyIE
 
-from ..compat import compat_urllib_parse
 from ..utils import (
     ExtractorError,
     sanitized_Request,
     smuggle_url,
     std_headers,
+    urlencode_postdata,
 )
 
 
@@ -57,7 +57,7 @@ class SafariBaseIE(InfoExtractor):
         }
 
         request = sanitized_Request(
-            self._LOGIN_URL, compat_urllib_parse.urlencode(login_form), headers=headers)
+            self._LOGIN_URL, urlencode_postdata(login_form), headers=headers)
         login_page = self._download_webpage(
             request, None, 'Logging in as %s' % username)