From 02816a3cb691e13ebbf46a38613979ac4df499d2 Mon Sep 17 00:00:00 2001
From: Christian Brabandt <cb@256bit.org>
Date: Mon, 8 Jan 2018 09:48:36 +0100
Subject: [PATCH] tabline: missing spaces

commit ab49a1c7aea5e77 changed that no leading whitespace was added.
While this removed a double space in front of the current active
selected buffer, it removed one space too much for the non-current
buffers in the bufferline.

So partly reverse it and only add the space, if the highlighting groups
between each item did not change.
---
 autoload/airline/extensions/tabline/buffers.vim | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/autoload/airline/extensions/tabline/buffers.vim b/autoload/airline/extensions/tabline/buffers.vim
index 1875642..5664d33 100644
--- a/autoload/airline/extensions/tabline/buffers.vim
+++ b/autoload/airline/extensions/tabline/buffers.vim
@@ -69,6 +69,7 @@ function! airline#extensions#tabline#buffers#get()
   if show_buf_label_first
     call airline#extensions#tabline#add_label(b, 'buffers')
   endif
+  let pgroup = ''
   for nr in s:get_visible_buffers()
     if nr < 0
       call b.add_raw('%#airline_tabhid#...')
@@ -86,20 +87,23 @@ function! airline#extensions#tabline#buffers#get()
       call b.add_raw('%'.nr.'@airline#extensions#tabline#buffers#clickbuf@')
     endif
 
+    let space= (pgroup == group ? s:spc: '')
+
     if get(g:, 'airline#extensions#tabline#buffer_idx_mode', 0)
       if len(s:number_map) > 0
-        call b.add_section(group, get(s:number_map, index, '') . '%(%{airline#extensions#tabline#get_buffer_name('.nr.')}%)' . s:spc)
+        call b.add_section(group, space. get(s:number_map, index, '') . '%(%{airline#extensions#tabline#get_buffer_name('.nr.')}%)' . s:spc)
       else
         call b.add_section(group, '['.index.s:spc.'%(%{airline#extensions#tabline#get_buffer_name('.nr.')}%)'.']')
       endif
       let index += 1
     else
-      call b.add_section(group, '%(%{airline#extensions#tabline#get_buffer_name('.nr.')}%)'.s:spc)
+      call b.add_section(group, space.'%(%{airline#extensions#tabline#get_buffer_name('.nr.')}%)'.s:spc)
     endif
 
     if has("tablineat")
       call b.add_raw('%X')
     endif
+    let pgroup=group
   endfor
 
   call b.add_section('airline_tabfill', '')