Fix ⊊, ⊋ on non-Set arguments (#42155)

Author: cmcaine

base/abstractset.jl

@@ -338,8 +338,8 @@ false
 """
 ⊊, ⊋
 
-⊊(a::AbstractSet, b) = length(a) < length(b) && a ⊆ b
-⊊(a, b) = Set(a) ⊊ b
+⊊(a::AbstractSet, b::AbstractSet) = length(a) < length(b) && a ⊆ b
+⊊(a, b) = Set(a) ⊊ Set(b)
 ⊋(a, b) = b ⊊ a
 
 function ⊈ end

test/sets.jl

@@ -803,3 +803,8 @@ end
     A = empty!(A)
     @test isempty(A)
 end
+
+@testset "⊊, ⊋" begin
+    @test !((1, 2) ⊊ (1, 2, 2))
+    @test !((1, 2, 2) ⊋ (1, 2))
+end