Minor fixes

Author: geonove

ddsketch/include/ddsketch.hpp

@@ -41,7 +41,7 @@ class  DDSketch {
 
   explicit DDSketch(const Mapping& index_mapping);
 
-  void update(const double&value, const double& count = 1.0);
+  void update(const double& value, const double& count = 1.0);
 
   template<store_concept OtherStore>
   void merge(const DDSketch<OtherStore, Mapping>& other);

ddsketch/include/ddsketch_impl.hpp

@@ -254,6 +254,8 @@ string<A> DDSketch<Store, Mapping>::to_string() const {
   os << "### ddsketch summary:" << std::endl;
   os << "   Index mapping         " << std::endl;
   os << index_mapping.to_string();
+  os << "   Min indexable value   : " << min_indexed_value << std::endl;
+  os << "   Max indexable value   : " << max_indexed_value << std::endl;
   os << "   Positive store        " << std::endl;
   os << positive_store.to_string();
   os << "   Negative store        " << std::endl;