Removal of final empty comment line after foreign keys results in duplicate `fk_rails_...` line

[ZimbiX]

Somebody on our team removed the final empty comment line on one of our models, to be:

# Foreign Keys
#
#  fk_rails_...  (delivered_session_id => delivered_sessions.id)

rather than what had been generated by annotaterb previously:

# Foreign Keys
#
#  fk_rails_...  (delivered_session_id => delivered_sessions.id)
#

Now running bundle exec annotaterb models results in:

[...]
# Foreign Keys
#
#  fk_rails_...  (delivered_session_id => delivered_sessions.id)
#
#  fk_rails_...  (delivered_session_id => delivered_sessions.id)

Relevant portion of the table schema from psql:

Foreign-key constraints:
    "fk_rails_9100988ca9" FOREIGN KEY (delivered_session_id) REFERENCES delivered_sessions(id)

Reproduced in annotaterb v4.20.0.

Rails 7.0.8.1

We place the annotations at the end of the file, in case that matters.