Clean whitespaces.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160668 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/Reassociate.cpp b/lib/Transforms/Scalar/Reassociate.cpp
index 3677630..ffcf97c 100644
--- a/lib/Transforms/Scalar/Reassociate.cpp
+++ b/lib/Transforms/Scalar/Reassociate.cpp
@@ -375,7 +375,7 @@
 /// nodes in Ops along with their weights (how many times the leaf occurs).  The
 /// original expression is the same as
 ///   (Ops[0].first op Ops[0].first op ... Ops[0].first)  <- Ops[0].second times
-/// op 
+/// op
 ///   (Ops[1].first op Ops[1].first op ... Ops[1].first)  <- Ops[1].second times
 /// op
 ///   ...