title-case function

["Paul W. Rankin" <hello@paulwrankin.com>]

Happy Easter to those who celebrate it!

I couldn't find a title-case function I considered good enough, so I 
wrote the one below. Please take a look and let me know if there are any 
edge cases I've missed or improvements you might have.

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(defcustom title-case-minor-words
  '("the ""a" "an" "and" "but" "for" "of" "or" "nor" "is" "as" "in" "to" 
  "into"
    "v" "vs" "de")
  "List of minor word strings that should be downcased in titles.
These words should be less than four characters."
  :type '(repeat string)
  :group 'editing-basics)

(defun title-case-region (beg end)
  "Convert region from BEG to END to Title Case.
First and last words are capitalized unconditionally, as are
words following colons and dashes. Words in list
`title-case-minor-words' are downcased."
  (interactive "r")
  (save-excursion
    (let (last-word)
      (goto-char end)
      (forward-word -1)
      (setq last-word (point))
      (capitalize-word 1)
      (goto-char beg)
      (unless (looking-at "\\b")
        (forward-word -1))
      (capitalize-word 1)
      (while (< (point) last-word (point-max))
        (if (looking-at "[:\x2013\x2014]")
            (capitalize-word 1)
          (skip-syntax-forward "-." last-word)
          (if (looking-at (concat "\\b" (regexp-opt 
          title-case-minor-words)
                                  "\\b"))
              (downcase-word 1)
            (capitalize-word 1)))))))
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