020da5bffb
This PR fixes an issue when including a hard line break in a `Format` that caused subsequent (ordinary) line breaks to be erroneously flattened to spaces. This issue is especially important for displaying notes and hints in error messages, as these components could appear garbled due to improper line-break rendering.
33 lines
977 B
Text
33 lines
977 B
Text
variable (n v₁ v₂) (hv₁: v₁ < n + 1) (hv₂: v₂ < n + 1)
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theorem foo (_: ¬ Fin.mk v₂ hv₂ = Fin.mk v₁ hv₁ ): True := trivial
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/--
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trace: [Meta.Tactic.simp.unify] eq_self:1000, failed to unify
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?a = ?a
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with
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⟨v₂, hv₂⟩ = ⟨v₁, hv₁⟩
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[Meta.Tactic.simp.rewrite] Fin.mk.injEq:1000:
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⟨v₂, hv₂⟩ = ⟨v₁, hv₁⟩
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==>
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v₂ = v₁
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[Meta.Tactic.simp.unify] eq_self:1000, failed to unify
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?a = ?a
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with
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v₂ = v₁
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[Meta.Tactic.simp.discharge] Nat.ne_of_gt discharge ✅️
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v₁ < v₂
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[Meta.Tactic.simp.rewrite] hv:1000:
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v₁ < v₂
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==>
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True
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[Meta.Tactic.simp.rewrite] Nat.ne_of_gt:1000:
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v₂ = v₁
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==>
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False
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-/
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#guard_msgs in
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set_option trace.Meta.Tactic.simp true in
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example (hv: v₁ < v₂) : True := foo n v₁ v₂ ‹_› ‹_› (by simp (config := { decide := true }) only [hv, Fin.mk.injEq, Nat.ne_of_gt, Nat.lt_succ_iff])
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#check Fin.mk.injEq
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