(WIP) HTTP chapter edits (quii#379)

* Update outdated descriptions and links (quii#358)

* Update reflection.md (quii#361)

Code examples for chan and func are incorrect

* Update select.md (quii#371)

Hi all,

I've been following this repo to help teach myself go and it's been a great help.
I noticed on line 399 the first argument in t.Run doesn't match the assertion. Raising this PR for your consideration as to whether you think this wording fits better or not.

* specifying what files need to be created

Co-authored-by: 森 優太 mori <59682979+uta-mori@users.noreply.github.com>
Co-authored-by: Johan Baaij <johanbaaij@gmail.com>
Co-authored-by: Brady <37232811+BClark88@users.noreply.github.com>

Author: 4 people

http-server.md

@@ -63,7 +63,7 @@ type Handler interface {
 
 A type implements the Handler interface by implementing the `ServeHTTP` method which expects two arguments, the first is where we _write our response_ and the second is the HTTP request that was sent to the server.
 
-Let's write a test for a function `PlayerServer` that takes in those two arguments. The request sent in will be to get a player's score, which we expect to be `"20"`.
+Let's create a file named `server_text.go` and write a test for a function `PlayerServer` that takes in those two arguments. The request sent in will be to get a player's score, which we expect to be `"20"`.
 
 ```go
 func TestGETPlayers(t *testing.T) {
@@ -96,7 +96,7 @@ In order to test our server, we will need a `Request` to send in and we'll want
 
 The compiler is here to help, just listen to it.
 
-Define `PlayerServer`
+Create a file `server.go` and define `PlayerServer`
 
 ```go
 func PlayerServer() {}
@@ -147,7 +147,7 @@ We want to wire this up into an application. This is important because
 - We'll have _actual working software_, we don't want to write tests for the sake of it, it's good to see the code in action.
 - As we refactor our code, it's likely we will change the structure of the program. We want to make sure this is reflected in our application too as part of the incremental approach.
 
-Create a new file for our application and put this code in.
+Create a new `main.go` file for our application and put this code in
 
 ```go
 package main

select.md

@@ -396,7 +396,7 @@ func TestRacer(t *testing.T) {
 		}
 	})
 
-	t.Run("returns an error if a server doesn't respond within 10s", func(t *testing.T) {
+	t.Run("returns an error if a server doesn't respond within the specified time", func(t *testing.T) {
 		server := makeDelayedServer(25 * time.Millisecond)
 
 		defer server.Close()