Fix typo in BitVector constructor (#39737)

(cherry picked from commit f07b12b)

Author: jakobnissen

base/bitarray.jl

@@ -605,7 +605,7 @@ gen_bitarrayN(::Type{BitVector}, itsz, itr)                        = gen_bitarra
 gen_bitarrayN(::Type{BitVector}, itsz::HasShape{1}, itr)           = gen_bitarray(itsz, itr)
 gen_bitarrayN(::Type{BitArray{N}}, itsz::HasShape{N}, itr) where N = gen_bitarray(itsz, itr)
 # The first of these is just for ambiguity resolution
-gen_bitarrayN(::Type{BitVector}, itsz::HasShape{N}, itr) where N      = throw(DimensionMismatch("cannot create a $T from a $N-dimensional iterator"))
+gen_bitarrayN(::Type{BitVector}, itsz::HasShape{N}, itr) where N      = throw(DimensionMismatch("cannot create a BitVector from a $N-dimensional iterator"))
 gen_bitarrayN(@nospecialize(T::Type), itsz::HasShape{N}, itr) where N = throw(DimensionMismatch("cannot create a $T from a $N-dimensional iterator"))
 gen_bitarrayN(@nospecialize(T::Type), itsz, itr) = throw(DimensionMismatch("cannot create a $T from a generic iterator"))
 

test/bitarray.jl

@@ -198,6 +198,9 @@ timesofar("utils")
                   ((x+y)%5==2 for x = 1:n1 for y = 1:n2))
             @test BitArray(g) == BitArray(collect(g))
         end
+        @test_throws DimensionMismatch BitVector(false)
+        @test_throws DimensionMismatch BitVector((iszero(i%4) for i in 1:n1, j in 1:n2))
+        @test_throws DimensionMismatch BitMatrix((isodd(i) for i in 1:3))
     end
 
     @testset "constructor from NTuple" begin