avoid copy

Author: lemire

src/debug_utils-inl.h

@@ -50,7 +50,7 @@ struct ToStringHelper {
   template <unsigned BASE_BITS,
             typename T,
             typename = std::enable_if_t<!std::is_integral_v<T>>>
-  static std::string BaseConvert(T value) {
+  static std::string BaseConvert(T& value) {
     return Convert(std::forward<T>(value));
   }
 };

src/util.h

@@ -391,8 +391,7 @@ class MaybeStackBuffer {
   // Disallow copy constructor
   MaybeStackBuffer(const MaybeStackBuffer&) = delete;
   // Disallow copy assignment operator
-  MaybeStackBuffer&
-    operator=(const MaybeStackBuffer& other) = delete;
+  MaybeStackBuffer& operator=(const MaybeStackBuffer& other) = delete;
 
   const T* out() const {
     return buf_;