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chore(library/hott/trunc): remove set_option

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Leonardo de Moura 2014-11-29 08:55:47 -08:00
parent d7042c4618
commit bed9467315
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library/hott/trunc.lean
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@ -211,7 +211,6 @@ namespace truncation
definition equiv_preserves_contr (f : A → B) [Hf : is_equiv f] [HA: is_contr A] : (is_contr B) :=
is_contr.mk (f (center A)) (λp, moveR_M f !contr)
set_option elaborator.trace_instances true
theorem contr_equiv (H : A ≃ B) [HA: is_contr A] : is_contr B :=
@equiv_preserves_contr _ _ (to_fun H) (to_is_equiv H) _