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

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2215,
 /**/
     2214,
 /**/

src/vim9compile.c

@@ -2947,7 +2947,7 @@ compile_list(char_u **arg, cctx_T *cctx, ppconst_T *ppconst)
 }
 
 /*
- * parse a lambda: {arg, arg -> expr}
+ * parse a lambda: "{arg, arg -> expr}" or "(arg, arg) => expr"
  * "*arg" points to the '{'.
  */
     static int
@@ -7315,6 +7315,19 @@ compile_exec(char_u *line, exarg_T *eap, cctx_T *cctx)
 	    eap->arg = skiptowhite(eap->arg);
     }
 
+    if ((eap->cmdidx == CMD_global || eap->cmdidx == CMD_vglobal)
+						       && STRLEN(eap->arg) > 4)
+    {
+	int delim = *eap->arg;
+
+	p = skip_regexp_ex(eap->arg + 1, delim, TRUE, NULL, NULL);
+	if (*p == delim)
+	{
+	    eap->arg = p + 1;
+	    has_expr = TRUE;
+	}
+    }
+
     if (has_expr && (p = (char_u *)strstr((char *)eap->arg, "`=")) != NULL)
     {
 	int	count = 0;