feat(topology/algebra/monoid): to_additivize some lemmas (#11310)
Uncomment a commented out to additive line that looks like its been there
for 3 years (since
https://github.com/leanprover-community/mathlib/commit/581cf19bf1885ef874c39c9902a93f579bc8c22d)
The changes to to_additive in the past few years now make the
generated lemma useful.
Also to_additivize a bunch of other lemmas in this file.
mathlib
ce17b657 - feat(topology/algebra/monoid): to_additivize some lemmas (#11310)
