docs: Fix some typos and missing instructions

extras/README.md

@@ -7,9 +7,9 @@ Some other programs I use that have dotfiles.
 - [httpie][httpie] - A friendly version of curl / wget
 - [feh][feh] - A GUI-less image viewer
 - [mpd][mpd] - The music player daemon
-- [ncmpcpp][ncmpcppp] - A stylish music player client for the terminal
+- [ncmpcpp][ncmpcpp] - A stylish music player client for the terminal
 - [youtube-dl][youtube-dl] - A program that can download online videos
-- [ranger][range] - A file explorer with image preview support for the terminal
+- [ranger][ranger] - A file explorer with image preview support for the terminal
 - [rtv][rtv] - A reddit browser for the terminal
 - [yay][yay] - An AUR helper for Arch Linux
 - [mpv][mpv] - A media player without the GUI
@@ -24,6 +24,14 @@ make package=extras
 
 Use these programs like you normally would, and the settings will be automatically applied.
 
+### Ranger
+
+In order to make image previews work with ranger, you must first copy the preview script.
+
+```sh
+ranger --copy-config=scope
+```
+
 [httpie]: https://www.archlinux.org/packages/community/any/httpie/
 [feh]: https://www.archlinux.org/packages/extra/x86_64/feh/
 [mpd]: https://www.archlinux.org/packages/extra/x86_64/mpd/

git/README.md

@@ -5,6 +5,7 @@ I use git as my main tool for distributed version control.
 ## Dependencies
 
 - [git][git] - The standard version control system
+- [diff-so-fancy][diff-so-fancy] - An amazing git diff utility
 
 ## Installation
 
@@ -24,3 +25,4 @@ Add a `.gituser` file to your `$HOME` with the following:
 ```
 
 [git]: https://www.archlinux.org/packages/extra/x86_64/git/
+[diff-so-fancy]: https://www.archlinux.org/packages/community/any/diff-so-fancy/