S'more small non-functional changes in comments and #includes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173738 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/IR/Attributes.cpp b/lib/IR/Attributes.cpp
index f56eb7b..0bc9262 100644
--- a/lib/IR/Attributes.cpp
+++ b/lib/IR/Attributes.cpp
@@ -16,7 +16,6 @@
 #include "llvm/IR/Attributes.h"
 #include "AttributeImpl.h"
 #include "LLVMContextImpl.h"
-#include "llvm/ADT/FoldingSet.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/IR/Type.h"
 #include "llvm/Support/Atomic.h"
@@ -28,7 +27,7 @@
 using namespace llvm;
 
 //===----------------------------------------------------------------------===//
-// Attribute Implementation
+// Attribute Construction Methods
 //===----------------------------------------------------------------------===//
 
 Attribute Attribute::get(LLVMContext &Context, AttrKind Kind) {
@@ -72,6 +71,10 @@
   return get(Context, B.addStackAlignmentAttr(Align));
 }
 
+//===----------------------------------------------------------------------===//
+// Attribute Accessor Methods
+//===----------------------------------------------------------------------===//
+
 bool Attribute::hasAttribute(AttrKind Val) const {
   return pImpl && pImpl->hasAttribute(Val);
 }