Tweak ASCII art in Simplify CFG. NFC

llvm-svn: 292792
diff --git a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
index 6e30919..cb1492f 100644
--- a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
@@ -1691,7 +1691,7 @@
   //      /    \
   //    [f(1)] [if]
   //      |     | \
-  //      |     |  \
+  //      |     |  |
   //      |  [f(2)]|
   //       \    | /
   //        [ end ]