fix(ui): ruler is not redrawn in cmdline with redrawstatus

runtime/doc/various.txt

@@ -32,7 +32,8 @@ CTRL-L			Clears and redraws the screen.  The redraw may happen
 						*:redraws* *:redrawstatus*
 :redraws[tatus][!]	Redraws the status line and window bar of the current
 			window, or all status lines and window bars if "!" is
-			included. Useful if 'statusline' or 'winbar' includes
+			included. Redraws the commandline instead if it contains
+			the 'ruler'. Useful if 'statusline' or 'winbar' includes
 			an item that doesn't cause automatic updating.
 
 						*:redrawt* *:redrawtabline*

src/nvim/drawscreen.c

@@ -2683,6 +2683,11 @@ void status_redraw_buf(buf_T *buf)
       redraw_later(wp, UPD_VALID);
     }
   }
+  // Redraw the ruler if it is in the command line and was not marked for redraw above
+  if (p_ru && !curwin->w_status_height && !curwin->w_redr_status) {
+    redraw_cmdline = true;
+    redraw_later(curwin, UPD_VALID);
+  }
 }
 
 /// Redraw all status lines that need to be redrawn.

test/functional/ui/statusline_spec.lua

@@ -636,3 +636,20 @@ it('statusline is redrawn on recording state change #22683', function()
     recording @Q                            |
   ]])
 end)
+
+it('ruler is redrawn in cmdline with redrawstatus #22804', function()
+  clear()
+  local screen = Screen.new(40, 2)
+  screen:attach()
+  command([[
+    let g:n = 'initial value'
+    set ls=1 ru ruf=%{g:n}
+    redraw
+    let g:n = 'other value'
+    redrawstatus
+  ]])
+  screen:expect([[
+    ^                                        |
+                          other value       |
+  ]])
+end)