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by pmontra
987 days ago
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Another way is to delete whitespace only in some modes.
Example from my .emacs (setq-default show-trailing-whitespace t)
(defun delete-trailing-whitespace-hook()
(add-hook 'before-save-hook 'delete-trailing-whitespace))
(add-hook 'ruby-mode-hook 'delete-trailing-whitespace-hook)
(add-hook 'python-mode-hook 'delete-trailing-whitespace-hook)
(add-hook 'lisp-mode-hook 'delete-trailing-whitespace-hook)
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