Fix typo.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171740 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Format/Format.cpp b/lib/Format/Format.cpp
index 4a34ad8..9823565 100644
--- a/lib/Format/Format.cpp
+++ b/lib/Format/Format.cpp
@@ -364,7 +364,7 @@
     ++State.ConsumedTokens;
   }
 
-  /// \brief Calculate the panelty for splitting after the token at \p Index.
+  /// \brief Calculate the penalty for splitting after the token at \p Index.
   unsigned splitPenalty(unsigned Index) {
     assert(Index < Line.Tokens.size() &&
            "Tried to calculate penalty for splitting after the last token");