Fix PR13411: Comment parsing: failed assertion on unterminated verbatim block.

The assertion was wrong in case we have a verbatim block without a closing
command.

Also add tests for closing command name in a verbatim block, since now it can
be empty in such cases.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160568 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/warn-documentation.cpp b/test/Sema/warn-documentation.cpp
index aec914a..69e12b5 100644
--- a/test/Sema/warn-documentation.cpp
+++ b/test/Sema/warn-documentation.cpp
@@ -276,3 +276,9 @@
   }
 }
 
+// PR13411, reduced.  We used to crash on this.
+/**
+ * @code Aaa.
+ */
+void test_nocrash1(int);
+