7 bail! messages in pr_merge.rs were prefixed pr-merge: -- the flat-alias
verb name that main.rs's renamed-verb list now refuses to run, not the
current pr merge kind-namespaced form. Someone who read the prefix and
tried hive-forge pr-merge got a second, unrelated refusal for a verb that
doesn't exist anymore.
#4157 swept the renamed verbs out of docs, prompts and the deprecation
list; it didn't cover runtime error prefixes, which is where these
survived (same shape as the two pr_status.rs had, fixed in #4182/#4184).
One of the seven also told the reader to check pr status --pr {number};
now pr status {number}, matching #4184's new positional form.
fixes#4183
911238ad73