fix trivial typos in comments; NFC

llvm-svn: 307007
diff --git a/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp b/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp
index 83290a6..8e1a634 100644
--- a/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp
+++ b/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp
@@ -6068,7 +6068,7 @@
   Preamble += "\n#define __OFFSETOFIVAR__(TYPE, MEMBER) ((long long) &((TYPE *)0)->MEMBER)\n";
 }
 
-/// RewriteIvarOffsetComputation - This rutine synthesizes computation of
+/// RewriteIvarOffsetComputation - This routine synthesizes computation of
 /// ivar offset.
 void RewriteModernObjC::RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
                                                          std::string &Result) {