patch 8.2.2215: Vim9: not recognized in global command

Problem:    Vim9:  not recognized in global command.
Solution:   Skip over pattern. (issue #7541)

src/testdir/test_vim9_cmd.vim

@@ -25,6 +25,15 @@ def Test_edit_wildcards()
   CheckDefFailure(['edit `="foo"'], 'E1083:')
 enddef
 
+def Test_global_backtick_expansion()
+  new
+  setline(1, 'xx')
+  var name = 'foobar'
+  g/^xx/s/.*/`=name`
+  assert_equal('foobar', getline(1))
+  bwipe!
+enddef
+
 def Test_hardcopy_wildcards()
   CheckUnix
   CheckFeature postscript