update TOC on save about markdown-toc HOT 2 OPEN

@VladimirAlexiev ,

If you want to restrict your hook for saving files in markdown-mode, not all files as your code currently does, you
would have to use a 2-step approach like the following:

(add-hook 'markdown-mode-hook
                   (lambda ()
                       (add-hook 'before-save-hook #'my-markdown-toc-refresh nil :local)))

The add-hook function has the LOCAL argument which must be set to non-nil to modify the hook's buffer-local value.

from markdown-toc.

Thanks @pierre-rouleau. This works perfectly:

(add-hook 'markdown-mode-hook
          (lambda ()
            (add-hook 'before-save-hook #'markdown-toc-refresh-toc)
            ))

from markdown-toc.