I tried wishing for "splashes of venom" but was told that no such
thing exists even though "splashs of venom" and "2 splash of venom"
both work to produce "2 splashes of venom". After the spurious
failure, retrying with EDIT_GETLIN enabled showed that "splashes"
had been singularized to "splashe" so fix that.
"2 splashes of venom" IDed to "2 uncursed blinding venoms" because
the base name omits "splash of" prefix. And due to that, explicitly
wishing for "splash of {acid,blinding} venom" didn't work either.
Change the names to include the prefix, and add a hack to makedefs
to keep generating the old macro names without the prefix. (Wishing
for "{acid,blinding} venom" still works due to post-3.6.6 changes
to " of " matching.)
42245f8e67