patch 8.2.1112: Vim9: no line continuation allowed in method call

Problem:    Vim9: no line continuation allowed in method call.
Solution:   Handle line continuation in expression before method call.
diff --git a/src/testdir/test_vim9_expr.vim b/src/testdir/test_vim9_expr.vim
index 1f4b254..ff662b9 100644
--- a/src/testdir/test_vim9_expr.vim
+++ b/src/testdir/test_vim9_expr.vim
@@ -1281,9 +1281,9 @@
 
   call CheckDefFailure(["let x = ''", "let y = x.memb"], 'E715:')
 
-  call CheckDefExecFailure(["[1, 2->len()"], 'E492:')
+  call CheckDefExecFailure(["[1, 2->len()"], 'E697:')
   call CheckDefExecFailure(["#{a: 1->len()"], 'E488:')
-  call CheckDefExecFailure(["{'a': 1->len()"], 'E492:')
+  call CheckDefExecFailure(["{'a': 1->len()"], 'E723:')
 endfunc
 
 let g:Funcrefs = [function('add')]