chore(ring_theory/algebra): simp-lemmas for alg_hom.to_linear_map (#1062)
* chore(ring_theory/algebra): simp-lemmas for alg_hom.to_linear_map
From the perfectoid project.
* Stupid error
* Update src/ring_theory/algebra.lean
Co-Authored-By: Chris Hughes <33847686+ChrisHughes24@users.noreply.github.com>