Re: Where in the vim script is "+-- N lines: " added to folded markdown headings?

On Saturday, August 15, 2015 at 12:42:27 AM UTC-6, Gary Johnson wrote:
> On 2015-08-14, wolfv wrote:
> > I am using vim 7.4 with
> > markdown heading folding from https://gist.github.com/vim-voom/1035030
> > and highlighting from /usr/share/vim/vim74/syntax/markdown.vim
> >
> > With this setup, folded headings are preceded by "+-- N lines: ", where N is the heading level.
> > Unfolded headings are rendered as is.
> > This causes folded and unfolded headings to misalign.
> > In this example, heading3 is unfolded:
> >
> > +-- 37 lines: #heading1
> >
> > +-- 85 lines: #heading2
> >
> > #heading3
> >
> > Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
> >
> > +-- 16 lines: #heading4
> >
> > Where in the vim script are the "+-- N lines: " added to the folded markdown headings?
> > I would like to change the vim script so that folded and unfolded headings align on the left, something like this:
> >
> > #heading1 :37 lines
> >
> > #heading2 :85 lines
> >
> > #heading3
> >
> > Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
> >
> > #heading4 :16 lines
>
> Those lines aren't added by the script; they are added by Vim itself
> and the foldtext() function, which is the default value of the
> 'foldtext' option. See
>
> :help foldtext()
> :help 'foldtext'
> :help fold-foldtext
>
> As described in those help topics, you can create your own
> 'foldtext' expression or function to format the fold lines as you
> like.
>
> As an example, here is the 'foldtext' function from my ~/.vimrc that
> I use for almost all my folding.
>
> set foldtext=MyFoldText()
> function! MyFoldText()
> let n = v:foldend - v:foldstart + 1
> let i = indent(v:foldstart)
> let istr = repeat(' ', i)
> return istr . "+-" . v:folddashes . " " . n . " lines "
> endfunction
>
> Regards,
> Gary

Thank you Gary for the great explanation.
My foldtext is working as desired:

setl foldtext=getline(v:foldstart).'\ \ \ :'.(v:foldend-v:foldstart)

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