patch 8.2.1500: Vim9: error when using address without a command

Problem:    Vim9: error when using address without a command.
Solution:   Execute the range itself. (closes #6747)
diff --git a/src/testdir/test_vim9_script.vim b/src/testdir/test_vim9_script.vim
index d442dc2..e8f0706 100644
--- a/src/testdir/test_vim9_script.vim
+++ b/src/testdir/test_vim9_script.vim
@@ -10,6 +10,13 @@
   let other: list<string> = ['asdf']
 enddef
 
+def Test_range_only()
+  new
+  setline(1, ['blah', 'Blah'])
+  :/Blah/
+  assert_equal(2, getcurpos()[1])
+enddef
+
 let s:appendToMe = 'xxx'
 let s:addToMe = 111
 let g:existing = 'yes'