Remove (c)transpose no-op for Strings and revise associated test.

Author: Sacha0

base/strings/basic.jl

@@ -101,8 +101,6 @@ function length(s::AbstractString)
     end
 end
 
-transpose(s::AbstractString) = s
-
 ## string comparison functions ##
 
 function cmp(a::AbstractString, b::AbstractString)

test/strings/basic.jl

@@ -464,7 +464,7 @@ foobaz(ch) = reinterpret(Char, typemax(UInt32))
 
 @test "a".*["b","c"] == ["ab","ac"]
 @test ["b","c"].*"a" == ["ba","ca"]
-@test ["a","b"].*["c","d"]' == ["ac" "ad"; "bc" "bd"]
+@test ["a","b"].*["c" "d"] == ["ac" "ad"; "bc" "bd"]
 
 # Make sure NULL pointers are handled consistently by String
 @test_throws ArgumentError unsafe_string(Ptr{UInt8}(0))