`pospell` fails with code entries

For 3.13, there was a change in the documentation that now snippets were marked as translatable.
This means that there is a large number of "new entries" that are snippets from the documentation page.

Even though I believe this is a great thing, the tooling around might need to be adapted.
Recently I discovered that in some cases, pospell fails to parse and handle such entries.

For example:

#: ../Doc/library/typing.rst:3167
msgid ""
"@type_check_only\n"
"class Response:  # private or not available at runtime\n"
"    code: int\n"
"    def get_header(self, name: str) -> str: ...\n"
"\n"
"def fetch_response() -> Response: ..."
msgstr ""
"@type_check_only\n"
"class Response:  # privada o no disponible en runtime\n"
"    code: int\n"
"    def get_header(self, name: str) -> str: ...\n"
"\n"
"def fetch_response() -> Response: ..."

Produces a

<rst-doc>:3: (ERROR/3) Unexpected indentation. while parsing: @type_check_only
class Response:  # privada o no disponible en runtime
    code: int
    def get_header(self, name: str) -> str: ...

def fetch_response() -> Response: ...

Marking those entries as fuzzy or adding three back-ticks "```" doesn't work, so I'm trying to brainstorm a bit how we could solve this.
A couple of ideas would be to:

1. Just try to fix at the docutils level (which is the source of the parsing error)
2. Introduce a new identifier like python-format in order to take the content for granted and avoid parsing it.

Ideas?

CC: @JulienPalard

Reproduce the failure with the multiline PO entry referenced from Doc/library/typing.rst, then inspect how pospell passes code entries to docutils. Determine whether the required change belongs in pospell or at the docutils level; done should mean these entries are handled without the reported parsing error.