The following guidelines will help you with Emacs text editor.

Replace tabulation with spaces

Replace tabulation with spaces (3) is necessary to write NTS files with uniform indentation. Add to your .emacs file the following lines:

(setq-default indent-tabs-mode nil)
(setq-default tab-width 3)
(setq indent-line-function 'insert-tab)

Some shortcuts

Find here a list of very useful Emacs shortcuts.