0.3.9

Three contributions from @SimonSapin:

• Add quote::Ident for interpolating an identifier (#17)

  let s = quote::Ident::new("S");
  let tokens = quote! { struct #s; };
  let expected = "struct Foo ;";
  assert_eq!(expected, tokens.to_string());

• Allow interpolating tuples, &[T] and Vec<T> (#18)

  let v: &[u32] = &[1, 2, 3];
  let tokens = quote! { let v = vec! #v; }
  let expected = "let v = vec ! [ 1u32 , 2u32 , 3u32 , ] ;";
  assert_eq!(expected, tokens.to_string());

• Add quote::Hex for interpolating integers in hexadecimal representation (#19)

  let hex = quote::Hex(0xFFFF_0000_u32);
  let tokens = quote! { #hex };
  let expected = "0xFFFF0000u32";
  assert_eq!(expected, tokens.to_string());