buffer_editor example with arguments in Quickstart (nushell#1810)

* Add quickstart example for editor args

* Fix typos

Author: NotTheDr01ds

book/configuration.md

@@ -21,6 +21,8 @@ can get started with just a few simple steps:
    $env.config.buffer_editor = "hx"
    # or
    $env.config.buffer_editor = "vi"
+   # with args
+   $env.config.buffer_editor = ["emacsclient", "-s", "light", "-t"]
    # etc.
    ```
 
@@ -576,7 +578,7 @@ The following stages and their steps _may_ occur during startup, based on the fl
 | 21.  | (config files) (config.nu)      | Loads a minimal `$env.config` record from the internal `default_config.nu`. This file can be viewed with: `nu config nu --default \| nu-highlight \| less -R`. Most values that are not defined in `default_config.nu` will be auto-populated into `$env.config` using their internal defaults as well.                                                                            |
 | 22.  | (config files) (config.nu)      | Loads (parses and evaluates) the user's `config.nu` (the path to which was determined above).                                                                                                                                                                                                                                                                                      |
 | 23.  | (config files) (login)          | When Nushell is running as a login shell, loads the user's `login.nu`.                                                                                                                                                                                                                                                                                                             |
-| 24.  | (config files)                  | Loops through autoload directories and loads any `.nu` files found. The directories are processed in the order found in `$nu.vendor-autoload-dirs`, and files in those directories are processed in alphabetical order.                                                                                                                                                     |
+| 24.  | (config files)                  | Loops through autoload directories and loads any `.nu` files found. The directories are processed in the order found in `$nu.vendor-autoload-dirs`, and files in those directories are processed in alphabetical order.                                                                                                                                                            |
 | 25.  | (repl)                          | Processes any additional `ENV_CONVERSIONS` that were defined in `config.nu` or the autoload files.                                                                                                                                                                                                                                                                                 |
 | 26.  | (repl) and (stdlib)             | Shows the banner if configured.                                                                                                                                                                                                                                                                                                                                                    |
 | 27.  | (repl)                          | Nushell enters the normal commandline (REPL).                                                                                                                                                                                                                                                                                                                                      |