Make Block act like a scalar under broadcasting

Author: mtfishman

src/blockindices.jl

@@ -52,7 +52,7 @@ last(b::Block) = b
 iterate(x::Block) = (x, nothing)
 iterate(x::Block, ::Any) = nothing
 isempty(x::Block) = false
-broadcastable(x::Block) = x
+broadcastable(x::Block) = Ref(x)
 ndims(::Type{<:Block}) = 0
 ndims(::Block) = 0
 eltype(::Type{B}) where B<:Block = B

test/test_blockindices.jl

@@ -19,7 +19,7 @@ import BlockArrays: BlockIndex, BlockIndexRange, BlockSlice
         @test ndims(B) == ndims(Block{1,Int}) == 0
         @test !isempty(B)
         @test collect(B) == [B]
-        @test B + 1 == Block(4)
+        @test B .+ 1 == Block(4)
         @test iterate(B) == (B, nothing)
         @test Int.(B) == 3
     end