Merge pull request #1459 from toivoh/show_symbol_with_colon

RFC: Show symbols with a colon

Author: JeffBezanson

base/show.jl

@@ -8,7 +8,7 @@ show(io, x) = ccall(:jl_show_any, Void, (Any, Any,), io::IOStream, x)
 showcompact(io, x) = show(io, x)
 showcompact(x)     = showcompact(OUTPUT_STREAM::IOStream, x)
 
-show(io, s::Symbol) = print(io, s)
+show(io, s::Symbol) = show_indented(io, s)
 show(io, tn::TypeName) = show(io, tn.name)
 show(io, ::Nothing) = print(io, "nothing")
 show(io, b::Bool) = print(io, b ? "true" : "false")