urllib.parse - quote/unquote documentation issues

https://docs.python.org/3/library/urllib.parse.html

1. It's my understanding that the arguement in the displayed usage shows the default. So:
   urllib.parse.quote(string, safe='/', encoding=None, errors=None)
   means that errors defaults to NoneType, however, the documentation just below that says:

"errors defaults to 'strict'

2. quote: There isn't a list of possible values for the "errors" argument

3. unquote - There isn't a list of possible values for the "errors" argument

4. unquote -

errors defaults to 'replace', meaning invalid sequences are replaced by a placeholder character.

What "placeholder character" is it that's used?

5. unquote

encoding defaults to 'utf-8'. errors defaults to 'replace', meaning invalid sequences are replaced by a placeholder character.

Is a single line. errors should be on a new line (all arguements for all functions really should always be on a new line unless there's a compelling reason not to. To do otherwise significantly impedes readability, while increasing the chances of misunderstanding).

Beginne mit der verlinkten Dokumentationsseite zu urllib.parse und überprüfe die Signaturen von quote und unquote sowie die Beschreibungen der umgebenden Parameter. Kläre die gemeldeten Standardwerte, die Wertelisten für errors, die Erklärung des Platzhalterzeichens und Fragen zur Formatierung, sodass auf der Seite die Argumente und das Verhalten jeder Funktion eindeutig dokumentiert sind.