Update docs/Common-Issues.md

I think this is a substantial improvement and does what I hoped, helps folks help themselves if--say--they just want to get emacs working; next time they'll have the technique in their pocket too.

Co-authored-by: Rylan Polster <rslpolster@gmail.com>
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@ -114,6 +114,6 @@ xcode-select --install
brew upgrade brew upgrade
``` ```
### Local build failures ### Other local issues
Build failures on one machine, but not similarly equipped machines (check issues for other projects too), can indicate that the install is borked. If `brew doctor` doesnt, reinstalling may help. That is, `brew bundle dump`, [uninstall](https://docs.brew.sh/FAQ#how-do-i-uninstall-homebrew), [reinstall](https://docs.brew.sh/Installation), and `brew bundle install`. If your Homebrew installation gets messed up (and fixing the issues found by `brew doctor` doesn't solve the problem), reinstalling Homebrew may help to reset to a normal state. To easily reinstall Homebrew, use [Homebrew Bundle](https://github.com/Homebrew/homebrew-bundle) to automatically restore your installed formulae and casks. To do so, run `brew bundle dump`, [uninstall](https://docs.brew.sh/FAQ#how-do-i-uninstall-homebrew), [reinstall](https://docs.brew.sh/Installation), and run `brew bundle install`.