defaults: set 'listchars' to "tab:> ,trail:-,nbsp:+". #2872

Re: https://github.com/neovim/neovim/issues/2676

src/nvim/option.c

@@ -515,6 +515,9 @@ void set_init_1(void)
   /* Parse default for 'fillchars'. */
   (void)set_chars_option(&p_fcs);
 
+  /* Parse default for 'listchars'. */
+  (void)set_chars_option(&p_lcs);
+
   /* enc_locale() will try to find the encoding of the current locale. */
   p = enc_locale();
   if (p != NULL) {

src/nvim/options.lua

@@ -1422,10 +1422,10 @@ return {
       full_name='listchars', abbreviation='lcs',
       type='string', list='comma', scope={'global'},
       deny_duplicates=true,
-      vi_def=true,
+      vim=true,
       redraw={'all_windows'},
       varname='p_lcs',
-      defaults={if_true={vi="eol:$"}}
+      defaults={if_true={vi="eol:$", vim="tab:> ,trail:-,nbsp:+"}}
     },
     {
       full_name='loadplugins', abbreviation='lpl',

src/nvim/testdir/test_breakindent.in

@@ -57,7 +57,7 @@ STARTTEST
 :let line1=ScreenChar(line('.'),10)
 :call DoRecordScreen()
 :let g:test=" Test 8: breakindent + shift:1 + nu + sbr=# list briopt:sbr"
-:set briopt=shift:1,sbr,min:0 nu sbr=# list
+:set briopt=shift:1,sbr,min:0 nu sbr=# list lcs&vi
 :let line1=ScreenChar(line('.'),10)
 :call DoRecordScreen()
 :let g:test=" Test 9: breakindent + shift by +1 + 'nu' + sbr=# list"