Pill 2 installer output snippets are outdated

[dabrahams]

Excerpts like this don't really work:

“Start looking at the output of the install command:

  copying Nix to /nix/store..........................”

Because the output of the installer doesn't contain that text anymore. Looks like (at least) this whole pill needs to be checked.

[henrik-ch]

Trying to break down the issues with this pill number 2.

• [ ] Fix chapter 2 introduction
• [ ] Fix chapter 2.1 Installation - just link to official reference instead of repeating info?
• [ ] Fix chapter 2.2 The beginnings of the Nix store
• [ ] Fix chapter 2.3 The Nix database
• [ ] Fix chapter 2.4 The first profile
• [ ] Fix chapter 2.5 Nixpkgs expressions
• [ ] Fix chapter 2.6 FAQ can I change /nix
• [ ] Fix chapter 2.7 conclusion