patch 8.2.1246: Vim9: comment after assignment doesn't work

Problem:    Vim9: comment after assignment doesn't work.
Solution:   Skip over white space. (closes #6481)

src/testdir/test_vim9_script.vim

@@ -29,7 +29,7 @@ def Test_assignment()
   call CheckDefFailure(['let x:string = "x"'], 'E1069:')
   call CheckDefFailure(['let a:string = "x"'], 'E1069:')
 
-  let a: number = 6
+  let a: number = 6 #comment
   assert_equal(6, a)
 
   if has('channel')
@@ -44,7 +44,7 @@ def Test_assignment()
   let Funky2: func = function('len')
   let Party2: func = funcref('g:Test_syntax')
 
-  g:newvar = 'new'
+  g:newvar = 'new'  #comment
   assert_equal('new', g:newvar)
 
   assert_equal('yes', g:existing)
@@ -821,6 +821,22 @@ def Test_cexpr_vimscript()
   set errorformat&
 enddef
 
+def Test_list_vimscript()
+  # checks line continuation and comments
+  let lines =<< trim END
+      vim9script
+      let mylist = [
+            'one',
+            # comment
+            'two', # empty line follows
+
+            'three',
+            ]
+      assert_equal(['one', 'two', 'three'], mylist)
+  END
+  CheckScriptSuccess(lines)
+enddef
+
 if has('channel')
   let someJob = test_null_job()
 

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1246,
 /**/
     1245,
 /**/

src/vim9compile.c

@@ -5706,7 +5706,7 @@ compile_assignment(char_u *arg, exarg_T *eap, cmdidx_T cmdidx, cctx_T *cctx)
 	    goto theend;
     }
 
-    ret = end;
+    ret = skipwhite(end);
 
 theend:
     vim_free(name);