Fix reloading of log file

Closes tpope#537

Author: tpope

ftplugin/railslog.vim

@@ -5,23 +5,21 @@ let b:did_ftplugin = 1
 
 function! s:reload_log() abort
   if &buftype == 'quickfix' && get(w:, 'quickfix_title') =~ '^:cgetfile'
-    let pos = getpos('.')
-    exe 'cgetfile' exists('*fnameescape') ? fnameescape(w:quickfix_title[10:-1]) : w:quickfix_title[10:-1]
-    call setpos('.', pos)
+    let cmd = 'cgetfile ' .
+          \ (exists('*fnameescape') ? fnameescape(w:quickfix_title[10:-1]) : w:quickfix_title[10:-1]) .
+          \ "|call setpos('.', " . string(getpos('.')) . ")"
   else
-    checktime
-  endif
-  if &l:filetype !=# 'railslog'
-    setfiletype railslog
+    let cmd = 'checktime'
   endif
+  return cmd . "|if &l:filetype !=# 'railslog'|setfiletype railslog|endif"
 endfunction
 
 if exists('w:quickfix_title')
   runtime! ftplugin/qf.vim ftplugin/qf_*.vim ftplugin/qf/*.vim
 endif
 let b:undo_ftplugin = get(b:, 'undo_ftplugin', 'exe')
-nnoremap <buffer> <silent> R :<C-U>call <SID>reload_log()<CR>
-nnoremap <buffer> <silent> G :<C-U>call <SID>reload_log()<Bar>exe v:count ? v:count : '$'<CR>
+nnoremap <buffer> <silent> R :<C-U>exe <SID>reload_log()<CR>
+nnoremap <buffer> <silent> G :<C-U>exe <SID>reload_log()<Bar>exe v:count ? v:count : '$'<CR>
 nnoremap <buffer> <silent> q :bwipe<CR>
 let b:undo_ftplugin .= '|sil! nunmap <buffer> R|sil! nunmap <buffer> G|sil! nunmap <buffer> q'
 setlocal noswapfile autoread