[cleanup] Misc fixes (see desc)

* [tvver] Fix bug in 6837633a4a - Closes #4054
* [rumble] Fix tests - Closes #3976
* [make] Remove `cat` abuse - Closes #3989
* [make] Revert #3684 - Closes #3814
* [utils] Improve `get_elements_by_class` - Closes #3993
* [utils] Inherit `Namespace` from `types.SimpleNamespace`
* [utils] Use `re.fullmatch` for matching filters
* [jsinterp] Handle quotes in `_separate`
* [make_readme] Allow overshooting last line

Authored by: pukkandan, kwconder, MrRawes, Lesmiscore

yt_dlp/jsinterp.py

@@ -24,6 +24,7 @@ _ASSIGN_OPERATORS.append(('=', (lambda cur, right: right)))
 _NAME_RE = r'[a-zA-Z_$][a-zA-Z_$0-9]*'
 
 _MATCHING_PARENS = dict(zip('({[', ')}]'))
+_QUOTES = '\'"'
 
 
 class JS_Break(ExtractorError):
@@ -69,12 +70,17 @@ class JSInterpreter:
             return
         counters = {k: 0 for k in _MATCHING_PARENS.values()}
         start, splits, pos, delim_len = 0, 0, 0, len(delim) - 1
+        in_quote, escaping = None, False
         for idx, char in enumerate(expr):
             if char in _MATCHING_PARENS:
                 counters[_MATCHING_PARENS[char]] += 1
             elif char in counters:
                 counters[char] -= 1
-            if char != delim[pos] or any(counters.values()):
+            elif not escaping and char in _QUOTES and in_quote in (char, None):
+                in_quote = None if in_quote else char
+            escaping = not escaping and in_quote and char == '\\'
+
+            if char != delim[pos] or any(counters.values()) or in_quote:
                 pos = 0
                 continue
             elif pos != delim_len: