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Commit 2020-09-30 16:47 a06c87ed

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chore(*): Tidy some proofs and variables (#4338)

Estimated changes

modified theorem free_algebra.hom_ext
modified def free_algebra.lift
modified theorem free_algebra.lift_comp_ι
modified theorem free_algebra.lift_unique
modified theorem free_algebra.lift_ι_apply
modified theorem free_algebra.ι_comp_lift