pkgs/git-diff-word: Add git shortcut to diff by character

pkgs/git-diff-word/default.nix

@@ -0,0 +1,9 @@
+{ pkgs, ... }:
+
+pkgs.writeShellApplication {
+  name = "git-diff-word";
+  text = builtins.readFile ./git-diff-word.sh;
+  runtimeInputs = with pkgs; [
+    git
+  ];
+}

pkgs/git-diff-word/git-diff-word.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+git diff --word-diff=color --word-diff-regex="." "$@"