Simple fill-sentence function

Question

I am new to emacs and would like to make a simple function to automate a series of commands I use repeatedly.

In auto-fill-mode after I edit the text I often need to re-wrap the lines. (I am writing in LaTeX with each sentence starting on a new line.) To do this I type M-a,C-SPC,M-e,M-q. This is equivalent to backward-sentence, set-mark-command, forward-sentence, fill-region.

How can I wrap these together in one simple command?

This is my non-working attempt:

(defun fill-sentence()
  "In auto-fill mode, select current sentence and re-wrap it."
  (interactive)
  ((backward-sentence)
   (set-mark-command)
   (forward-sentence)
   (fill-region)))

Answer 1

Based on the docstrings of the commands, you probably want something along the lines of:

(defun fill-sentence ()
  (interactive)
  ;; optional 
  ;; (save-excursion
  (backward-sentence)
  (push-mark)
  (forward-sentence)
  (fill-region (point) (mark))
  ;; )
  )

The optional save-excursion (and commented )) will keep the point where you started (so can be used mid-change to keep track of wrapping without breaking flow).