The arguments types shorthand syntax is wrongly/awkwardly introduced

[dario-piotrowicz]

It is quite minor, anyways I've noticed that in the integers section (which comes after the hello-world one), the arguments types shorthand syntax is introduced/explained:

learn-go-with-tests/integers.md

Lines 61 to 66 in e759bc1

	func Add(x, y int) int {
	return 0
	}
	```
	When you have more than one argument of the same type \(in our case two integers\) rather than having `(x int, y int)` you can shorten it to `(x, y int)`.

What I think is wrong is that the syntax was already used in the hello-world section (but not explained there):

learn-go-with-tests/hello-world.md

Line 303 in e759bc1

func assertCorrectMessage(t testing.TB, got, want string) {

So the guide is initially using the syntax in the hello-world section without explaining it and it later introduces it.

I think that this could be improved by either:

• removing the shorthand from the hello-world code:

  -   func assertCorrectMessage(t testing.TB, got, want string) {
  +   func assertCorrectMessage(t testing.TB, got string, want string) {

• or keeping the shorthand in the hello-world code but then have the shorthand explanation there instead of having it in the integers section