Differentially tested the current parser against the pre-PR one over every template
shape shipped in config.ini.example and docs (31 shapes x 3 field sets x 4 message
states, 372 comparisons) plus 32 adversarial inputs. That found one regression I had
introduced: reading a quote immediately after ':' as the start of a quoted argument
voided `prefix_if_nonempty:"`, whose unterminated string rejected the whole
placeholder and emitted raw template text. An unterminated quote now falls back to
greedy parsing, so a literal quote prefix behaves as it always has. Both cases are
pinned by tests.
Also covered the shorten_url alias in feed formats, which had none: accepted as a
function, chains like shorten, falls back to the original on failure, is seen through
by shorten_feed_urls so a link is not shortened twice, and does not swallow an
unrelated name that merely starts with it.
Reset the warn-once flag in the async no-warning test. It asserted warning was never
called while a preceding test could already have tripped the flag, so it would have
passed vacuously.
agessaman
4753bf32b3