Merge branch 'main' of github.com:leanprover-community/lean4game

server/nng/NNG/MyNat/AddCommMonoid.lean

@@ -12,7 +12,6 @@ namespace MyNat
 -- precisely the oddball (to my eyes) classes which nat was an instance of,
 -- but I think they would make great collectibles.
 
-
 -- instance addSemigroup : AddSemigroup ℕ :=
 -- {
 --   zero := 0
@@ -20,4 +19,4 @@ namespace MyNat
 -- }
 -- MyNat.addMonoid        -- (after level 2)
 -- MyNat.addCommSemigroup -- (after level 4)
--- MyNat.addCommMonoid    -- (after level 4)
+-- MyNat.addCommMonoid    -- (after level 4)

server/nng/NNG/MyNat/LE.lean

@@ -10,7 +10,7 @@ def le (a b : ℕ) :=  ∃ (c : ℕ), b = a + c
 -- the existence definition.
 
 -- | le 0 _
--- | le (succ a) (succ b) = le ab 
+-- | le (succ a) (succ b) = le ab
 
 -- notation
 instance : LE MyNat := ⟨MyNat.le⟩
@@ -19,4 +19,4 @@ instance : LE MyNat := ⟨MyNat.le⟩
 
 theorem le_iff_exists_add (a b : ℕ) : a ≤ b ↔ ∃ (c : ℕ), b = a + c := Iff.rfl
 
-end MyNat
+end MyNat