style(library/init/function): fix spelling error (is calles surjective) (#573)
style(library/init/function): fix spelling error (is calles surjective) (#573)

Fix spelling error "is calles surjective" -> "is called surjective"



leanprover-community/lean,digama0/lean,leanprover-community/lean,leanprover-community/lean,digama0/lean,digama0/lean,digama0/lean,digama0/lean,leanprover-community/lean,leanprover-community/lean,leanprover-community/lean,digama0/lean