I noticed that hovering over fishing rods in the inventory no longer displays a valid tooltip due to the appended fishhook-related strings in version 3.70+.
These changes to the encyclopedia should bring the relevant sections up-to-date.
FISHING ROD - more strings and info paraphrased from the devlog
.FISHING ROD.FISHING ROD WITH IRON HOOK.FISHING ROD WITH BONE HOOK.FISHING ROD WITH WOODEN HOOK.
A common tool for active fishing.
Begin angling with a fishing rod either by using the FISHING skill or by applying the fishing rod from the inventory when near open water. Casting the line requires having at least one arm in useable condition.
Although it is not necessary to bait the fishhook when you start an angling session, an empty hook is far less attractive to nibble on than one with a bit of food.
Predatory fish species favour raw meat and fish, while others may be drawn in by your cookery leftovers or even raw vegetable matter.
Fishhook entries
.FISHING ROD WITH NO HOOK.
A common tool for fishing rendered useless without a new fishhook.
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.FISHHOOK.IRON FISHHOOK.BONE FISHHOOK.WOODEN FISHHOOK.
The part of a fishing rod that catches fish.
Fishhooks may snap off as the line wears out from use, especially around the hook. This wear is relative to the number and size of the fish that have nibbled the line over time.
You can use a spare fishhook to repair a hookless fishing rod. First apply the fishhook, and then select a fishing rod to repair.
If you wish to swap a fishhook from one rod to another, first remove the hook by applying a fishing rod when you are on dry land away from open water.
Some blacksmiths may fashion iron fishhooks for a fee. These are the best kind to use and most durable.
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TOOLS - one line edit
NET, NETTING NEEDLE, FISHING ROD, FISHHOOK, <br>
SKILLS - one line edit
TRAPPING, CARPENTRY, BUILDING, TEXTILECRAFT, NETMAKING<br>