[test] Convert warnings into errors

* And fix some existing warnings

Authored by: fstirlitz

yt_dlp/extractor/gedidigital.py

@@ -11,7 +11,7 @@ from ..utils import (
 
 
 class GediDigitalIE(InfoExtractor):
-    _VALID_URL = r'''(?x)(?P<url>(?:https?:)//video\.
+    _VALID_URL = r'''(?x:(?P<url>(?:https?:)//video\.
         (?:
             (?:
                 (?:espresso\.)?repubblica
@@ -33,7 +33,7 @@ class GediDigitalIE(InfoExtractor):
                 |corrierealpi
                 |lasentinella
             )\.gelocal
-        )\.it(?:/[^/]+){2,4}/(?P<id>\d+))(?:$|[?&].*)'''
+        )\.it(?:/[^/]+){2,4}/(?P<id>\d+))(?:$|[?&].*))'''
     _TESTS = [{
         'url': 'https://video.lastampa.it/politica/il-paradosso-delle-regionali-la-lega-vince-ma-sembra-aver-perso/121559/121683',
         'md5': '84658d7fb9e55a6e57ecc77b73137494',