Typo in error message of setindex! for slicing SparseAxisArrays (#3057)

Author: blegat

src/Containers/SparseAxisArray.jl

@@ -99,7 +99,8 @@ function Base.setindex!(d::SparseAxisArray{T,N,K}, value, idx...) where {T,N,K}
     elseif _sliced_key_type(K, idx...) !== nothing
         throw(
             ArgumentError(
-                "Slicing is not when calling setindex! on a SparseAxisArray",
+                "Slicing is not supported when calling `setindex!` on a" *
+                " SparseAxisArray",
             ),
         )
     end

test/Containers/SparseAxisArray.jl

@@ -214,7 +214,8 @@ $(SparseAxisArray{Float64,2,Tuple{Symbol,Char}}) with 2 entries"""
     @testset "Slicing on set" begin
         Containers.@container(x[i = 1:4, j = 1:2; isodd(i + j)], i + j)
         err = ArgumentError(
-            "Slicing is not when calling setindex! on a SparseAxisArray",
+            "Slicing is not supported when calling `setindex!` on a" *
+            " SparseAxisArray",
         )
         @test_throws(err, x[:, :] = 1)
         @test_throws(err, x[1, :] = 1)