chore: cleaunp grind tests

Tests using `logInfo` were taking an additional two seconds on my
machine. This is a performance issue with the old code generator,
where we spend all this time specializing the logging functions for
`GoalM`. I have not checked whether the new code generator is also
affected by this performance issue.

Here is a small example that exposes the issue:
```lean
import Lean

set_option profiler true
open Lean Meta Grind in
def test (e : Expr): GoalM Unit := do
  logInfo e
```

cc @zwarich

tests/lean/run/grind_canon_insts.lean

@@ -53,11 +53,13 @@ theorem left_comm [CommMonoid α] (a b c : α) : a * (b * c) = b * (a * c) := by
 open Lean Meta Elab Tactic Grind in
 def fallback : Fallback := do
   let nodes ← filterENodes fun e => return e.self.isAppOf ``HMul.hMul
-  logInfo (nodes.toList.map (·.self))
+  trace[Meta.debug] "{nodes.toList.map (·.self)}"
   (← get).mvarId.admit
 
+set_option trace.Meta.debug true
+
 /--
-info: [b * c, a * (b * c), d * (b * c)]
+info: [Meta.debug] [b * c, a * (b * c), d * (b * c)]
 -/
 #guard_msgs (info) in
 example (a b c d : Nat) : b * (a * c) = d * (b * c) → False := by
@@ -68,7 +70,8 @@ example (a b c d : Nat) : b * (a * c) = d * (b * c) → False := by
 set_option pp.notation false in
 set_option pp.explicit true in
 /--
-info: [@HMul.hMul Nat Nat Nat (@instHMul Nat instMulNat) b a, @HMul.hMul Nat Nat Nat (@instHMul Nat instMulNat) b d]
+info: [Meta.debug] [@HMul.hMul Nat Nat Nat (@instHMul Nat instMulNat) b a,
+     @HMul.hMul Nat Nat Nat (@instHMul Nat instMulNat) b d]
 -/
 #guard_msgs (info) in
 example (a b c d : Nat) : b * a = d * b → False := by

tests/lean/run/grind_canon_types.lean

@@ -6,12 +6,13 @@ def f (a : α) := a
 open Lean Meta Grind in
 def fallback : Fallback := do
   let nodes ← filterENodes fun e => return e.self.isAppOf ``f
-  logInfo (nodes.toList.map (·.self))
+  trace[Meta.debug] "{nodes.toList.map (·.self)}"
   (← get).mvarId.admit
 
+set_option trace.Meta.debug true
 set_option pp.explicit true
 /--
-info: [@f Nat a, @f Nat b]
+info: [Meta.debug] [@f Nat a, @f Nat b]
 -/
 #guard_msgs (info) in
 example (a b c d : Nat) : @f Nat a = b → @f (g Nat) a = c → @f (g Nat) b = d → a = b → False := by

tests/lean/run/grind_congr.lean

@@ -8,35 +8,36 @@ open Lean Meta Grind in
 def fallback : Fallback := do
   let #[n, _] ← filterENodes fun e => return e.self.isAppOf ``f | unreachable!
   let eqc ← getEqc n.self
-  logInfo eqc
+  trace[Meta.debug] eqc
   (← get).mvarId.admit
 
+set_option trace.Meta.debug true
 set_option grind.debug true
 set_option grind.debug.proofs true
 
 /--
-info: [d, f b, c, f a]
+info: [Meta.debug] [d, f b, c, f a]
 -/
 #guard_msgs (info) in
 example (a b c d : Nat) : a = b → f a = c → f b = d → False := by
   grind on_failure fallback
 
 /--
-info: [d, f b, c, f a]
+info: [Meta.debug] [d, f b, c, f a]
 -/
 #guard_msgs (info) in
 example (a b c d : Nat) : f a = c → f b = d → a = b → False := by
   grind on_failure fallback
 
 /--
-info: [d, f (g b), c, f (g a)]
+info: [Meta.debug] [d, f (g b), c, f (g a)]
 -/
 #guard_msgs (info) in
 example (a b c d e : Nat) : f (g a) = c → f (g b) = d → a = e → b = e → False := by
   grind on_failure fallback
 
 /--
-info: [d, f (g b), c, f v]
+info: [Meta.debug] [d, f (g b), c, f v]
 -/
 #guard_msgs (info) in
 example (a b c d e v : Nat) : f v = c → f (g b) = d → a = e → b = e → v = g a → False := by

tests/lean/run/grind_nested_proofs.lean

@@ -5,12 +5,13 @@ def f (α : Type) [Add α] (a : α) := a + a + a
 open Lean Meta Grind in
 def fallback : Fallback := do
   let nodes ← filterENodes fun e => return e.self.isAppOf ``Lean.Grind.nestedProof
-  logInfo (nodes.toList.map (·.self))
+  trace[Meta.debug] "{nodes.toList.map (·.self)}"
   let nodes ← filterENodes fun e => return e.self.isAppOf ``GetElem.getElem
   let [_, n, _] := nodes.toList | unreachable!
-  logInfo (← getEqc n.self)
+  trace[Meta.debug] "{← getEqc n.self}"
   (← get).mvarId.admit
 
+set_option trace.Meta.debug true
 set_option grind.debug true
 set_option grind.debug.proofs true
 
@@ -20,26 +21,21 @@ The following test relies on `grind` `nestedProof` wrapper to
 detect equalities between array access terms.
 -/
 
-/-
-info: [Lean.Grind.nestedProof (i < a.toList.length) (_example.proof_1 i j a b h1 h2),
- Lean.Grind.nestedProof (j < a.toList.length) h1,
- Lean.Grind.nestedProof (j < b.toList.length) h]
----
-info: [a[i], b[j], a[j]]
----
-warning: declaration uses 'sorry'
+/--
+info: [Meta.debug] [Lean.Grind.nestedProof (i < a.toList.length) (_example.proof_1 i j a b h1 h2),
+     Lean.Grind.nestedProof (j < a.toList.length) h1,
+     Lean.Grind.nestedProof (j < b.toList.length) h]
+[Meta.debug] [a[i], b[j], a[j]]
 -/
--- #guard_msgs in
-
+#guard_msgs (info) in
 example (i j : Nat) (a b : Array Nat) (h1 : j < a.size) (h : j < b.size) (h2 : i ≤ j) : a[i] < a[j] + b[j] → i = j → a = b → False := by
   grind on_failure fallback
 
 /--
-info: [Lean.Grind.nestedProof (i < a.toList.length) (_example.proof_1 i j a b h1 h2),
- Lean.Grind.nestedProof (j < a.toList.length) h1,
- Lean.Grind.nestedProof (j < b.toList.length) h]
----
-info: [a[i], a[j]]
+info: [Meta.debug] [Lean.Grind.nestedProof (i < a.toList.length) (_example.proof_1 i j a b h1 h2),
+     Lean.Grind.nestedProof (j < a.toList.length) h1,
+     Lean.Grind.nestedProof (j < b.toList.length) h]
+[Meta.debug] [a[i], a[j]]
 -/
 #guard_msgs (info) in
 example (i j : Nat) (a b : Array Nat) (h1 : j < a.size) (h : j < b.size) (h2 : i ≤ j) : a[i] < a[j] + b[j] → i = j → False := by

tests/lean/run/grind_norm_levels.lean

@@ -5,12 +5,13 @@ def g {α : Sort u} (a : α) := a
 open Lean Meta Grind in
 def fallback : Fallback := do
   let nodes ← filterENodes fun e => return e.self.isAppOf ``g
-  logInfo (nodes.toList.map (·.self))
+  trace[Meta.debug] "{nodes.toList.map (·.self)}"
   (← get).mvarId.admit
 
 -- `grind` final state must contain only two `g`-applications
+set_option trace.Meta.debug true in
 /--
-info: [g (a, b), g (g (a, b))]
+info: [Meta.debug] [g (a, b), g (g (a, b))]
 -/
 #guard_msgs (info) in
 example {β : Type v} {α : Type u} (a c : α) (b d : β) : g.{max u v + 1} (a, b) = (c, d) → g (g.{max (u+1) (v+1)} (a, b)) = (c, d) → False := by

tests/lean/run/grind_propagate_connectives.lean

@@ -1,24 +1,25 @@
 import Lean.Meta.Tactic.Grind
 
+set_option trace.Meta.debug true
+
 open Lean Meta Grind in
 def fallback : Fallback := do
   let trueExprs := (← filterENodes fun e => return e.self.isFVar && (← isEqTrue e.self)).toList.map (·.self)
   let falseExprs := (← filterENodes fun e => return e.self.isFVar && (← isEqFalse e.self)).toList.map (·.self)
-  logInfo m!"true:  {trueExprs}"
-  logInfo m!"false: {falseExprs}"
+  trace[Meta.debug] "true:  {trueExprs}"
+  trace[Meta.debug] "false: {falseExprs}"
   forEachEqcRoot fun n => do
     unless (← isProp n.self) || (← isType n.self) || n.size == 1 do
       let eqc ← getEqc n.self
-      logInfo eqc
+      trace[Meta.debug] eqc
   (← get).mvarId.admit
 
 set_option grind.debug true
 set_option grind.debug.proofs true
 
 /--
-info: true:  [q, w]
----
-info: false: [p, r]
+info: [Meta.debug] true:  [q, w]
+[Meta.debug] false: [p, r]
 -/
 #guard_msgs (info) in
 example : (p ∨ (q ∧ ¬r ∧ w)) → ¬p → False := by
@@ -26,9 +27,8 @@ example : (p ∨ (q ∧ ¬r ∧ w)) → ¬p → False := by
 
 
 /--
-info: true:  [r]
----
-info: false: [p, q]
+info: [Meta.debug] true:  [r]
+[Meta.debug] false: [p, q]
 -/
 #guard_msgs (info) in
 example : (p ∨ q ∨ r) → (p ∨ ¬q) → ¬p → False := by
@@ -36,72 +36,63 @@ example : (p ∨ q ∨ r) → (p ∨ ¬q) → ¬p → False := by
 
 
 /--
-info: true:  [r]
----
-info: false: [p₁, q]
+info: [Meta.debug] true:  [r]
+[Meta.debug] false: [p₁, q]
 -/
 #guard_msgs (info) in
 example : ((p₁ ∧ p₂) ∨ q ∨ r) → (p₁ ∨ ¬q) → p₁ = False → False := by
   grind on_failure fallback
 
 /--
-info: true:  [r]
----
-info: false: [p₂, q]
+info: [Meta.debug] true:  [r]
+[Meta.debug] false: [p₂, q]
 -/
 #guard_msgs (info) in
 example : ((p₁ ∧ p₂) ∨ q ∨ r) → ((p₂ ∧ p₁) ∨ ¬q) → p₂ = False → False := by
   grind on_failure fallback
 
 /--
-info: true:  [q, r]
----
-info: false: [p]
+info: [Meta.debug] true:  [q, r]
+[Meta.debug] false: [p]
 -/
 #guard_msgs (info) in
 example (p q r : Prop) : p ∨ (q ↔ r) → p = False → q → False := by
   grind on_failure fallback
 
 /--
-info: true:  [r]
----
-info: false: [p, s]
+info: [Meta.debug] true:  [r]
+[Meta.debug] false: [p, s]
 -/
 #guard_msgs (info) in
 example (p q r : Prop) : p ∨ ¬(s ∨ (p ↔ r)) → p = False → False := by
   grind on_failure fallback
 
 /--
-info: true:  [p]
----
-info: false: []
----
-info: [a, b]
+info: [Meta.debug] true:  [p]
+[Meta.debug] false: []
+[Meta.debug] [a, b]
 -/
 #guard_msgs (info) in
 example (p : Prop) (a : Vector Nat 5) (b : Vector Nat 6) : (p → HEq a b) → p → False := by
   grind on_failure fallback
 
 /--
-info: true:  [p, q]
----
-info: false: [r]
+info: [Meta.debug] true:  [p, q]
+[Meta.debug] false: [r]
 -/
 #guard_msgs (info) in
 example (p q r : Prop) : p ∨ (q ↔ r) → q → ¬r → False := by
   grind on_failure fallback
 
 /--
-info: hello world
----
-info: true:  [p, q]
----
-info: false: [r]
+info: [Meta.debug] hello world
+[Meta.debug] true:  [p, q]
+[Meta.debug] false: [r]
 -/
 #guard_msgs (info) in
 example (p q r : Prop) : p ∨ (q ↔ r) → ¬r → q → False := by
   grind on_failure do
-    Lean.logInfo "hello world"
+    trace[Meta.debug] "hello world"
     fallback
 
 example (a b : Nat) : (a = b) = (b = a) := by

tests/lean/run/grind_revertAll.lean

@@ -1,27 +0,0 @@
-import Lean
-
-open Lean Elab Tactic in
-elab "revert_all" : tactic => do
-  liftMetaTactic1 (·.revertAll)
-
-open Lean Elab Tactic in
-elab "ensure_no_mvar" : tactic => do
-  liftMetaTactic1 fun mvarId => do
-    mvarId.ensureNoMVar
-    return mvarId
-
-example {α : Type u} [Inhabited α] (a : α) (f : α → α) (h : f a = default) : default = f a := by
-  revert_all
-  ensure_no_mvar
-  guard_target =ₛ∀ {α : Type u} [inst : Inhabited α] (a : α) (f : α → α), f a = default → default = f a
-  intro α inst a f h
-  exact h.symm
-
-example (a b : α) (h₁ : a = b) (f g : α → α) (h₂ : ∀ x, f x = x) (h₃ : ∀ x, g x = f x) : ∃ x : α, f x = a ∧ g x = b := by
-  apply Exists.intro
-  revert_all
-  fail_if_success ensure_no_mvar
-  intro β a₁ a₂ h f₁ f₂ h' h''
-  constructor
-  · exact h' a₁
-  · rw [h'', h]; exact h' a₂