Remember, trailing whitespace is contagious and can easily take over a file much like North American Ivy!
Be a good camper and don't commit trailing whitespace.
If you're using Emacs, try adding this to
(setq-default show-trailing-whitespace t) (setq-default default-indicate-empty-lines t) (setq-default indent-tabs-mode nil) (set-variable default-indicate-empty-lines t)
You can customize the file to help out with other guidelines too. If you want
to be safe, have tabs (excluding those
\t) expand to spaces when you save:
(defun perl-mode-untabify () (save-excursion (goto-char (point-min)) (while (re-search-forward "[ \t]+$" nil t) (delete-region (match-beginning 0) (match-end 0))) (goto-char (point-min)) (if (search-forward "\t" nil t) (untabify (1- (point)) (point-max)))) nil) (add-hook 'perl-mode-hook '(lambda () (make-local-variable 'write-contents-hooks) (add-hook 'write-contents-hooks 'perl-mode-untabify)))
vim users can add the following to
>>>>>>>>>>>>>> syntax enable set cindent smartindent smarttab showmatch shiftwidth=4 set expandtab au BufRead,BufNewFile *.bml setfiletype perl set backup set list listchars=trail:_ highlight SpecialKey ctermfg=DarkGray ctermbg=yellow <<<<<<<<<<<<<<<
expandtab make sure the
indents are made up of 4 spaces.
backup, makes a backup file named filename~, which might be
useful on occasions when your main file gets overwritten by accident.
highlight SpecialKey combined
mark trailing whitespace with a grey underscore on a yellow background,
quite easy to notice if you are working against a black background.
Also, tab characters will show up as grey ^I on a yellow background.