Correct hyphenations in comments and assert messages

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

llvm-svn: 196466
diff --git a/clang/lib/Rewrite/Frontend/RewriteObjC.cpp b/clang/lib/Rewrite/Frontend/RewriteObjC.cpp
index 3dda2c5..b610969 100644
--- a/clang/lib/Rewrite/Frontend/RewriteObjC.cpp
+++ b/clang/lib/Rewrite/Frontend/RewriteObjC.cpp
@@ -2523,7 +2523,7 @@
   unsigned i;
   for (i=0; i < tmpName.length(); i++) {
     char c = tmpName.at(i);
-    // replace any non alphanumeric characters with '_'.
+    // replace any non-alphanumeric characters with '_'.
     if (!isAlphanumeric(c))
       tmpName[i] = '_';
   }