patch 8.2.3405: cannot have a comment line in a {} block of a user command

Problem:    Cannot have a comment line in a {} block of a user command.
Solution:   Continue after the line break. (closes #8837)
diff --git a/src/testdir/test_usercommands.vim b/src/testdir/test_usercommands.vim
index 9cb592e..3f15dc1 100644
--- a/src/testdir/test_usercommands.vim
+++ b/src/testdir/test_usercommands.vim
@@ -624,7 +624,8 @@
 
 func Test_usercmd_with_block()
   command DoSomething {
-        g:didit = 'yes'
+        g:didit = 'yes'  # comment
+        # comment line
         g:didmore = 'more'
       }
   DoSomething