Correct word hyphenations

This patch tries to avoid unrelated changes other than fixing a few
hyphen-related ambiguities and contractions in nearby lines.

llvm-svn: 196471
diff --git a/llvm/lib/Analysis/ScalarEvolutionExpander.cpp b/llvm/lib/Analysis/ScalarEvolutionExpander.cpp
index 86a557b..ca7c73f 100644
--- a/llvm/lib/Analysis/ScalarEvolutionExpander.cpp
+++ b/llvm/lib/Analysis/ScalarEvolutionExpander.cpp
@@ -1528,7 +1528,7 @@
   //
   // This is independent of PostIncLoops. The mapped value simply materializes
   // the expression at this insertion point. If the mapped value happened to be
-  // a postinc expansion, it could be reused by a non postinc user, but only if
+  // a postinc expansion, it could be reused by a non-postinc user, but only if
   // its insertion point was already at the head of the loop.
   InsertedExpressions[std::make_pair(S, InsertPt)] = V;
   return V;