Update doc/fzf.txt accordingly

doc/fzf.txt

@@ -87,9 +87,7 @@ Examples~
     " In Neovim, you can set up fzf window using a Vim command
     let g:fzf_layout = { 'window': 'enew' }
     let g:fzf_layout = { 'window': '-tabnew' }
-
-    " This will split only under the current window.
-    let g:fzf_layout = { 'window': '10 split | enew'}
+    let g:fzf_layout = { 'window': '10split enew' }
 
     " Customize fzf colors to match your color scheme
     let g:fzf_colors =