runtime(vim): Update base syntax, match :*do command arg

Match the Ex command arg to all :*do commands.

closes: #18700

Signed-off-by: Doug Kearns <dougkearns@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

runtime/syntax/testdir/input/vim_ex_do_commands.vim

@@ -0,0 +1,58 @@
+" Vim :*do commands
+
+
+argdo  echo "..."
+argdo! echo "..."
+
+bufdo  echo "..."
+bufdo! echo "..."
+
+cdo  echo "..."
+cdo! echo "..."
+
+cfdo  echo "..."
+cfdo! echo "..."
+
+folddoclosed echo "..."
+
+folddoopen echo "..."
+
+ldo  echo "..."
+ldo! echo "..."
+
+lfdo  echo "..."
+lfdo! echo "..."
+
+tabdo echo "..."
+
+windo echo "..."
+
+
+def Vim9Context()
+  argdo  echo "..."
+  argdo! echo "..."
+
+  bufdo  echo "..."
+  bufdo! echo "..."
+
+  cdo  echo "..."
+  cdo! echo "..."
+
+  cfdo  echo "..."
+  cfdo! echo "..."
+
+  folddoclosed echo "..."
+
+  folddoopen echo "..."
+
+  ldo  echo "..."
+  ldo! echo "..."
+
+  lfdo  echo "..."
+  lfdo! echo "..."
+
+  tabdo echo "..."
+
+  windo echo "..."
+enddef
+