In the dwarven section of entity_default for generals and militia commanders it has SOLDIER_COLOR] missing the first square bracket. Since 'soldier colour' doesn't appear anywhere else it could be unimplemented and purposeful, or it might just be a typo that was copy/pasted.
I'll list it. No idea what the tag does though.
It doesn't do anything, since it's not a valid tag. The missing bracket is deliberate, and adding it back in will only serve to spam entries in your error log.
Having looked through the rest of the corrections on the list, the mountain goat entry already contains the correct GENERAL_CHILD_NAME tag. The erroneous horse foal tag is a duplicate entry that Toady just forgot to delete. It's probably preferable to just delete the spurious entry, rather than replacing it, to avoid having duplicate tags (although it won't actually cause any problems).
Also, as shadow_slicer pointed out, your quarry bush correction is ambiguous. In order for the fix to work, the [EDIBLE_COOKED] tag must go somewhere after [USE_MATERIAL_TEMPLATE:LEAF:LEAF_TEMPLATE] and before [USE_MATERIAL_TEMPLATE:SEED:SEED_TEMPLATE]. For formatting's sake, I suppose it should ideally come immediately after the [MATERIAL_VALUE:5] line, but (I think) it should work if you put it anywhere between those two entries mentioned above.
To contribute a few of my own:
Some entries in plant_standard.txt are missing a VALUE tag. Since plants can now inherit their value from the MATERIAL_VALUE of their structural material (I think), this may be intended. Nevertheless, VALUE is still a valid tag for plants, and the presence/absence of the tag is inconsistent from one plant to the next.
Secondly, to fix seeds no longer being cookable, you can add [EDIBLE_COOKED] to the seed entry in material_template_default.txt.
Edit: Oh, and one more that I forgot. In your fix for soap, since soap is a bar, you need to add [PRODUCT_DIMENSION:150] on the product line. I'm not sure what happens if you omit it, but I suspect it means you'll end up needing 150 bars for everything you need to do, instead of just the one.