CI's docs-rustdoc check (-D rustdoc::private-intra-doc-links) failed:
start's and continue_'s public # Errors sections linked to check_model
with [`check_model`], but check_model is (correctly) private. Drop the
bracketed link and keep the plain backticked reference — the sentence
still names the check, it just stops trying to hyperlink a private item
from public docs.
Refs #4436