md: use of ft-local functions instead of script-local functions

after/ftplugin/markdown.vim

@@ -25,7 +25,7 @@ let b:loaded_denote_ftplugin_notes = 1
 
 " Find the column where the completion starts. This must be between 1 and
 " col('.'). Denote links are of this form: `denote:<identifier>`.
-function s:column()
+function DenoteNoteCompleteLinkColumn()
 	" Get the substring from the start of the line until col('.')
 	let l:x = max([1, col('.')-2])
 	let l:l = getline('.')[:l:x]
@@ -48,7 +48,7 @@ function s:column()
 endfunction
 
 " Return completion items given by the base
-function s:suggestions(base)
+function DenoteNoteCompleteLinkSuggestions(base)
 	let l:prefix = a:base->matchstr('^denote:\zs.*$')
 	let l:flist = glob(g:denote_directory .. '/' .. (l:prefix ? '*' .. l:prefix .. '*' : '*'), 0, v:true)
 	let l:res = []
@@ -68,19 +68,19 @@ function s:suggestions(base)
 endfunction
 
 " Completion function for denote links
-function s:complete_link(findstart, base)
-	return a:findstart == 1 ? s:column() : s:suggestions(a:base)
+function DenoteNoteCompleteLink(findstart, base)
+	return a:findstart == 1 ? DenoteNoteCompleteLinkColumn() : DenoteNoteCompleteLinkSuggestions(a:base)
 endfunction
-setlocal omnifunc=s:complete_link()
+setlocal omnifunc=DenoteNoteCompleteLink
 " Denote links are of the form 'denote:<note id>'; we require the column.
 setlocal isfname+=:
 " Set the function to resolve the filename under the cursor (see |gf|).
-function s:gotofile()
+function DenoteNoteGotoFile()
 	return v:fname !~ '^denote:'
 				\ ? v:fname
 				\ : libdenote#scheme_find(g:denote_directory, v:fname[7:]) ?? v:fname
 endfunction
-setlocal includeexpr=s:gotofile()
+setlocal includeexpr=DenoteNoteGotoFile()
 
 " Back references command
 let b:meta = libdenote#scheme_metadata(expand('%:t'))