vim-patch:8.1.2124: ruler is not updated if win_execute() moves cursor

Problem:    Ruler is not updated if win_execute() moves cursor.
Solution:   Update the status line. (closes vim/vim#5022)
345f28df54

src/nvim/eval/funcs.c

@@ -2047,12 +2047,18 @@ static void f_win_execute(typval_T *argvars, typval_T *rettv, FunPtr fptr)
   tabpage_T *save_curtab;
 
   if (wp != NULL && tp != NULL) {
+    pos_T curpos = wp->w_cursor;
     if (switch_win_noblock(&save_curwin, &save_curtab, wp, tp, true) ==
         OK) {
       check_cursor();
       execute_common(argvars, rettv, fptr, 1);
     }
     restore_win_noblock(save_curwin, save_curtab, true);
+
+    // Update the status line if the cursor moved.
+    if (win_valid(wp) && !equalpos(curpos, wp->w_cursor)) {
+        wp->w_redr_status = true;
+    }
   }
 }
 

src/nvim/testdir/test_execute_func.vim

@@ -1,5 +1,7 @@
 " test execute()
 
+source view_util.vim
+
 func NestedEval()
   let nested = execute('echo "nested\nlines"')
   echo 'got: "' . nested . '"'
@@ -105,6 +107,24 @@ func Test_win_execute()
   bwipe!
 endfunc
 
+func Test_win_execute_update_ruler()
+  enew
+  call setline(1, range(500))
+  20
+  split
+  let winid = win_getid()
+  set ruler
+  wincmd w
+  let height = winheight(winid)
+  redraw
+  call assert_match('20,1', Screenline(height + 1))
+  let line = win_execute(winid, 'call cursor(100, 1)')
+  redraw
+  call assert_match('100,1', Screenline(height + 1))
+
+  bwipe!
+endfunc
+
 func Test_win_execute_other_tab()
   let thiswin = win_getid()
   tabnew