patch 8.2.2398: method test fails

Problem:    Method test fails.
Solution:   Adjust test for allowed white space.
diff --git a/src/testdir/test_method.vim b/src/testdir/test_method.vim
index 0d55f2a..262c08c 100644
--- a/src/testdir/test_method.vim
+++ b/src/testdir/test_method.vim
@@ -131,9 +131,11 @@
   eval [1, 2, 3]  
 	\ ->sort(
 	\ )
-  call assert_fails('eval [1, 2, 3]-> sort()', 'E15:')
+  eval [1, 2, 3]-> sort()
+
   call assert_fails('eval [1, 2, 3]->sort ()', 'E274:')
-  call assert_fails('eval [1, 2, 3]-> sort ()', 'E15:')
+  call assert_fails('eval [1, 2, 3] ->sort ()', 'E274:')
+  call assert_fails('eval [1, 2, 3]-> sort ()', 'E274:')
 endfunc
 
 func Test_method_lambda()