Add toc_link_format option

Add an option for setting the format of the links in the Table of Contents:
- Extended (the current and default)
- Brief (new format for the Vimwiki markup)

autoload/vimwiki/base.vim

@@ -1893,11 +1893,13 @@ function! vimwiki#base#table_of_contents(create)
     for idx in range(h_level, 5) | let headers_levels[idx] = ['', 0] | endfor
 
     let h_complete_id = ''
+    if vimwiki#vars#get_global('toc_link_format') == 0
       for l in range(h_level-1)
         if headers_levels[l][0] != ''
           let h_complete_id .= headers_levels[l][0].'#'
         endif
       endfor
+    endif
     let h_complete_id .= headers_levels[h_level-1][0]
 
     if numbering > 0 && numbering <= h_level
@@ -1916,8 +1918,10 @@ function! vimwiki#base#table_of_contents(create)
   for [lvl, link, desc] in complete_header_infos
     if vimwiki#vars#get_wikilocal('syntax') == 'markdown'
       let link_tpl = vimwiki#vars#get_syntaxlocal('Weblink2Template')
-    else
+    elseif vimwiki#vars#get_global('toc_link_format') == 0
       let link_tpl = vimwiki#vars#get_global('WikiLinkTemplate2')
+    else
+      let link_tpl = vimwiki#vars#get_global('WikiLinkTemplate1')
     endif
     let link = s:safesubstitute(link_tpl, '__LinkUrl__',
           \ '#'.link, '')

autoload/vimwiki/vars.vim

@@ -181,6 +181,7 @@ function! s:read_global_settings_from_user()
         \ 'tags_header_level': {'type': type(0), 'default': 1, 'min': 1, 'max': 5},
         \ 'toc_header': {'type': type(''), 'default': 'Contents', 'min_length': 1},
         \ 'toc_header_level': {'type': type(0), 'default': 1, 'min': 1, 'max': 6},
+        \ 'toc_link_format': {'type': type(0), 'default': 0, 'min': 0, 'max': 1},
         \ 'url_maxsave': {'type': type(0), 'default': 15, 'min': 0},
         \ 'use_calendar': {'type': type(0), 'default': 1, 'min': 0, 'max': 1},
         \ 'use_mouse': {'type': type(0), 'default': 0, 'min': 0, 'max': 1},

doc/vimwiki.txt

@@ -2992,6 +2992,21 @@ are from 1 to 6.
 The default is 1.
 
 
+------------------------------------------------------------------------------
+*g:vimwiki_toc_link_format*
+
+The format of the links in the Table of Contents (see |vimwiki-toc|).
+
+
+Value           Description~
+0               Extended: The link contains the description and URL. URL
+                references all levels.
+1               Brief: The link contains only the URL. URL references only
+                the immediate level.
+
+Default: 0
+
+
 ------------------------------------------------------------------------------
 *g:vimwiki_map_prefix*