86e77588

By: Lucien Huber <im@lcnbr.ch>

assert the rendered ExecutionMode.Single docstring in the spynso3 stub test

spenso_stub_preserves_typed_index_defaults_and_execution_semantics still
looked for the numpydoc variant line "Single : Select one smallest-degree
rewrite per step; ...". 96a7941e6 dropped that Variants section from the
ExecutionMode docstring. The sentence is now the doc comment of the Single
variant, which the stub renders as an attribute docstring below
"Single: typing.ClassVar[ExecutionMode]" (docs/api/python/spynso3.pyi), so
the assertion fails. CI never builds the exporter tests with the spenso
feature, so the failure went unnoticed.

Assert the member line together with its docstring, and reject the retired
"Execute one contraction at a time" text in any rendering rather than only
in the old numpydoc form.

nix-ci.nix: enable = false during review.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

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