Fixed unterminated string issue.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@42022 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/AST/CFG.cpp b/AST/CFG.cpp
index 3ccaa05..10318f8 100644
--- a/AST/CFG.cpp
+++ b/AST/CFG.cpp
@@ -1281,7 +1281,7 @@
   GraphHelper = NULL;
 #else
   std::cerr << "CFG::viewCFG is only available in debug builds on "
-            << "systems with Graphviz or gv!\";
+            << "systems with Graphviz or gv!\n";
 #endif
 }