patch 8.1.1764: ":browse oldfiles" is not tested

Problem:    ":browse oldfiles" is not tested.
Solution:   Add a test.
diff --git a/src/testdir/test_viminfo.vim b/src/testdir/test_viminfo.vim
index 8206458..306f54d 100644
--- a/src/testdir/test_viminfo.vim
+++ b/src/testdir/test_viminfo.vim
@@ -537,4 +537,10 @@
   call assert_equal(['1: /tmp/file_one.txt', '2: /tmp/file_two.txt', '3: /tmp/another.txt'], filter(split(execute('oldfiles'), "\n"), {i, v -> v =~ '/tmp/'}))
   call assert_equal(['1: /tmp/file_one.txt', '2: /tmp/file_two.txt'], filter(split(execute('filter file_ oldfiles'), "\n"), {i, v -> v =~ '/tmp/'}))
   call assert_equal(['3: /tmp/another.txt'], filter(split(execute('filter /another/ oldfiles'), "\n"), {i, v -> v =~ '/tmp/'}))
+
+  new
+  call feedkeys("3\<CR>", 't')
+  browse oldfiles
+  call assert_equal("/tmp/another.txt", expand("%"))
+  bwipe
 endfunc
diff --git a/src/version.c b/src/version.c
index da62479..6619c7b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1764,
+/**/
     1763,
 /**/
     1762,