Update brew.md

man/brew.md

@@ -4,13 +4,13 @@
 
 create a `Brewfile` ... well, on your old/original system
 
-```
+```shell
 brew bundle dump --file Brewfile
 ```
 
 install all packages:
 
-```
+```shell
 brew bundle
 ```
 
@@ -24,36 +24,23 @@ brew uninstall --zap microsoft-edge
 
 ## update brew (packages/apps)
 
-```
+```shell
 brew update
 brew upgrade
 brew cask upgrade
 ```
 
 ## clear cache
 
-because `brew cleanup` does not clean up.
-
-```
-rm -r $(brew --cache)
-```
-
-there's also:
-
-```
-brew cleanup
-```
-
-to make it even more confusing, there's also:
+because `brew cleanup` does not clean up all the things.
 
 ```shell
-brew cleanup -s
+brew cleanup --prune=all -s
+rm -r $(brew --cache)
 ```
 
-> Scrub the cache, including downloads for even the latest versions. Note downloads for any installed formulae or casks will still not be deleted. If you want to delete those too: `rm -rf "$(brew --cache)"`
-
 ## reinstall all packages
 
-```
+```shell
 brew list | xargs brew reinstall
 ```