From 02fe20ece46912dd964a185bf6896fc8759564d2 Mon Sep 17 00:00:00 2001
From: "Justin M. Keyes" <justinkz@gmail.com>
Date: Fri, 14 Sep 2018 18:45:22 +0200
Subject: [PATCH] Use :keeppatterns with :substitute

---
 autoload/fugitive.vim | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/autoload/fugitive.vim b/autoload/fugitive.vim
index d7621a6..bacf5f3 100644
--- a/autoload/fugitive.vim
+++ b/autoload/fugitive.vim
@@ -1493,13 +1493,13 @@ function! fugitive#BufReadCmd(...) abort
           if getline('.') ==# 'parent '
             silent keepjumps delete_
           else
-            silent exe 'keepjumps s/\m\C\%(^parent\)\@<! /\rparent /e' . (&gdefault ? '' : 'g')
+            silent exe (exists(':keeppatterns') ? 'keeppatterns' : '') 'keepjumps s/\m\C\%(^parent\)\@<! /\rparent /e' . (&gdefault ? '' : 'g')
           endif
           keepjumps let lnum = search('^encoding \%(<unknown>\)\=$','W',line('.')+3)
           if lnum
             silent keepjumps delete_
           end
-          silent keepjumps 1,/^diff --git\|\%$/g/\r$/s///
+          silent exe (exists(':keeppatterns') ? 'keeppatterns' : '') 'keepjumps 1,/^diff --git\|\%$/g/\r$/s///'
           keepjumps 1
         endif
       elseif b:fugitive_type ==# 'stage'