patch 8.1.0836: user completion test can fail on MS-Windows

Problem:    User completion test can fail on MS-Windows.
Solution:   Allow for other names befor "Administrator".

src/testdir/test_cmdline.vim

@@ -430,8 +430,9 @@ func Test_cmdline_complete_user_names()
     let names = system('net user')
     if names =~ 'Administrator'
       " Trying completion of  :e ~A  should complete to Administrator.
+      " There could be other names starting with "A" before Administrator.
       call feedkeys(':e ~A' . "\<c-a>\<c-B>\"\<cr>", 'tx')
-      call assert_match('^"e \~Administrator', @:)
+      call assert_match('^"e \~.*Administrator', @:)
     endif
   endif
 endfunc

src/version.c

@@ -783,6 +783,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    836,
 /**/
     835,
 /**/