Zeros prints like sparse matrix (#76)

* Zeros prints like sparse matrix

* Add test

* Int64 -> $Int

Author: dlfivefifty

Project.toml

@@ -1,6 +1,6 @@
 name = "FillArrays"
 uuid = "1a297f60-69ca-5386-bcde-b61e274b549b"
-version = "0.7.3"
+version = "0.7.4"
 
 [deps]
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
@@ -12,6 +12,7 @@ julia = "1"
 
 [extras]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+Base64 = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
 
 [targets]
-test = ["Test"]
+test = ["Test","Base64"]

src/FillArrays.jl

@@ -458,4 +458,10 @@ count(f, x::AbstractFill) = f(getindex_value(x)) ? length(x) : 0
 include("fillalgebra.jl")
 include("fillbroadcast.jl")
 
+##
+# print
+##
+Base.replace_in_print_matrix(::Zeros, ::Integer, ::Integer, s::AbstractString) = 
+    Base.replace_with_centered_mark(s)
+
 end # module

test/runtests.jl

@@ -1,4 +1,4 @@
-using FillArrays, LinearAlgebra, SparseArrays, Random, Test
+using FillArrays, LinearAlgebra, SparseArrays, Random, Base64, Test
 import FillArrays: AbstractFill, RectDiagonal
 
 @testset "fill array constructors and convert" begin
@@ -874,3 +874,7 @@ end
         @test adjoint(A)*fillmat ≈ adjoint(A)*Array(fillmat)
     end
 end
+
+@testset "print" begin
+    @test stringmime("text/plain", Zeros(3)) == "3-element Zeros{Float64,1,Tuple{Base.OneTo{$Int}}}:\n  ⋅ \n  ⋅ \n  ⋅ "
+end