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 #5022)

src/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 . '"'
@@ -101,6 +103,24 @@ 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