Add support for inserting ArrayRef<FixItHint> into DiagnosticBuilder.

This is going to be needed in clang-tidy as more checks add complex fixits.

llvm-svn: 230495
diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp
index c26ba3c..409a1b6 100644
--- a/clang/lib/Sema/SemaChecking.cpp
+++ b/clang/lib/Sema/SemaChecking.cpp
@@ -3152,10 +3152,7 @@
   if (InFunctionCall) {
     const Sema::SemaDiagnosticBuilder &D = S.Diag(Loc, PDiag);
     D << StringRange;
-    for (ArrayRef<FixItHint>::iterator I = FixIt.begin(), E = FixIt.end();
-         I != E; ++I) {
-      D << *I;
-    }
+    D << FixIt;
   } else {
     S.Diag(IsStringLocation ? ArgumentExpr->getExprLoc() : Loc, PDiag)
       << ArgumentExpr->getSourceRange();
@@ -3165,10 +3162,7 @@
              diag::note_format_string_defined);
 
     Note << StringRange;
-    for (ArrayRef<FixItHint>::iterator I = FixIt.begin(), E = FixIt.end();
-         I != E; ++I) {
-      Note << *I;
-    }
+    Note << FixIt;
   }
 }