fix: makefile tabs warning

Author: dwmkerr

docs/07-shell-snippets/00-index.md

@@ -93,7 +93,13 @@ This is a snippet I include in every Makefile that I use. It simply adds a defau
 
 All you need to add to your Makefile is the recipe `help` shown below. To add a description to any other recipe just add a comment that follows its name!
 
-```make
+:::warning
+
+Makefiles must be indented with tabs, not spaces, copy the source-code from [`makefile-help`](https://github.com/dwmkerr/makefile-help) if the code below doesn't work, it seems that docusaurus might transform tabs to spaces.
+
+:::
+
+```makefile title="https://github.com/dwmkerr/makefile-help"
 default: help
 
 .PHONY: help

docusaurus.config.js

@@ -55,11 +55,6 @@ const config = {
             require.resolve('react-mailchimp-email-signup-form/dist/esm/index.css'),
             require.resolve('asciinema-player/dist/bundle/asciinema-player.css'),
           ],
-
-          //  Add theming support for languages we use.
-          // prism: {
-          //   additionalLanguages: [],
-          // },
         },
         gtag: {
           trackingID: 'G-8HZFMZV9Z4',
@@ -182,6 +177,8 @@ const config = {
       prism: {
         theme: lightCodeTheme,
         darkTheme: darkCodeTheme,
+        //  Add theming support for languages we use.
+        additionalLanguages: ['makefile'],
       },
       liveCodeBlock: {
         /**