Hook fixes

[nafg]

1. Fixes a spelling mistake
2. The instructions should be prepended, not appended.

With --verbose, the file contains

# ------------------------ >8 ------------------------
# Do not modify or remove the line above.
# Everything below it will be ignored.

Fix courtesy of https://chat.openai.com/share/a7452aa6-aefd-4284-adeb-37e3491b07ff ;)