Fix invalid copy command in docs (#25)

`cp` commands expects a destination argument which was missing.

Author: SyedAhkam

docs/customize_terminal/customize_terminal.md

@@ -32,9 +32,9 @@ In order to customize the terminal, you need to edit the following files
 
 Copy it to `mysite/layouts`
 ```bash
-$mkdir -p ./layouts/partials
-$cp ./themes/hugo-theme-shell/layouts/index.html
-$cp ./themes/hugo-theme-shell/partials/typeIndex.html
+$ mkdir -p ./layouts/partials
+$ cp themes/hugo-theme-shell/layouts/index.html layouts/partials
+$ cp themes/hugo-theme-shell/partials/typeIndex.html layouts/partials
 ```
 
 ## 2. Edit file
@@ -160,4 +160,4 @@ Many of the variables in `typeIndex.html` (`envWithDir, cat ... `) are defined i
 | leaf | `[folderName] etc` |
 | ps1delay | `display speed of [userName]@[pcName]:~/` |
 | stdoutdelay | `display speed of [description], [leaf]` |
-| commanddelay | `display speed of command(cd [workdir] / cat [profile])` |
+| commanddelay | `display speed of command(cd [workdir] / cat [profile])` |