fix typeinfo for sparse-matrix/vector display

Author: stevengj

stdlib/SparseArrays/src/sparsematrix.jl

@@ -152,7 +152,7 @@ function Base.show(io::IO, ::MIME"text/plain", S::SparseMatrixCSC)
               xnnz == 1 ? "entry" : "entries")
     if xnnz != 0
         print(io, ":")
-        show(io, S)
+        show(IOContext(io, :typeinfo => eltype(S)), S)
     end
 end
 

stdlib/SparseArrays/src/sparsevector.jl

@@ -828,7 +828,7 @@ function show(io::IO, ::MIME"text/plain", x::AbstractSparseVector)
            " stored ", xnnz == 1 ? "entry" : "entries")
     if xnnz != 0
         println(io, ":")
-        show(io, x)
+        show(IOContext(io, :typeinfo => eltype(x)), x)
     end
 end