[2.0.30] merged item/recipe factoriopedia entries do not show "spoilage from"

[planetfall]

I was working on a mod which allows you to "grow" certain intermediates from biological cultures (items which spoil into the desired item) as an alternate way to produce them on Gleba. I noticed that the factoriopedia page for the desired product did not mention this, which seems wrong to me - the spoilage page lists all items that spoil into spoilage, and the factoriopedia really ought to list every method to produce a given item.

Steps to reproduce:
1. Install the attached mod (makes copper plates spoil into iron plates, makes iron plates spoil into nutrients)
2. Observe the factoriopedia entries for all affected items:
- copper plate entry correctly shows they spoil into iron plates
- nutrients entry correctly shows they spoil from iron plates
- iron plates entry correctly shows they spoil into nutrients, but omits that they spoil from copper plates

The determining factor seems to be whether the entry is an "item/recipe" page vs. an item that is shown as having exclusively alternative recipes.