Emacs/Formatting
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Stylish Haskell
Use M-x haskell-mode-stylish-buffer to call stylish-haskell on the current buffer.
On Save
To use it on your Emacs before every save, you first need haskell-mode-save-buffer. It is recommended to rebind C-x C-s in haskell-mode to this. Add the following in your haskell-mode-hook.
(define-key haskell-mode-map (kbd "C-x C-s") 'haskell-mode-save-buffer)
To enable Stylish Haskell, pop the following somewhere in your Emacs configuration:
(setq haskell-stylish-on-save t)
Or in your custom set variables:
(custom-set-variables '(haskell-stylish-on-save t))
Or you can M-x customize-group haskell and pretend none of this exists!