Fix typo: inccrementally

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@192551 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Rewrite/Frontend/InclusionRewriter.cpp b/lib/Rewrite/Frontend/InclusionRewriter.cpp
index 49b23dd..bd4250a 100644
--- a/lib/Rewrite/Frontend/InclusionRewriter.cpp
+++ b/lib/Rewrite/Frontend/InclusionRewriter.cpp
@@ -342,7 +342,7 @@
   return true;
 }
 
-/// Use a raw lexer to analyze \p FileId, inccrementally copying parts of it
+/// Use a raw lexer to analyze \p FileId, incrementally copying parts of it
 /// and including content of included files recursively.
 bool InclusionRewriter::Process(FileID FileId,
                                 SrcMgr::CharacteristicKind FileType)