[Glacier] Cleanup formatting for Array and Vector.

lib/glacier/container/array_view.h

@@ -8,16 +8,21 @@ template <typename T>
 class ArrayView {
  public:
   ArrayView() : data_(nullptr), size_(0) {}
+
   ArrayView(const ArrayView&) = default;
+  ArrayView(ArrayView&&) = default;
+
   ArrayView(T* data, uint64_t size) : data_(data), size_(size) {}
 
+  // Accessors.
+  T& operator[](uint64_t index) { return data_[index]; }
+  const T& operator[](uint64_t index) const { return data_[index]; }
+
   T* RawPtr() { return data_; }
   const T* RawPtr() const { return data_; }
 
   uint64_t size() const { return size_; }
-
-  T& operator[](uint64_t index) { return data_[index]; }
-  const T& operator[](uint64_t index) const { return data_[index]; }
+  bool empty() const { return size_; }
 
  private:
   T* data_;