Set a default value for DIGITS

JsonGenerator/JsonValue.h

@@ -46,7 +46,7 @@ namespace ArduinoJson
                 content.asString = value;
             }
 
-            template<int DIGITS>
+            template<int DIGITS=2>
             void set(double value)
             {
                 printToImpl = &printDoubleTo<DIGITS>;

JsonGeneratorTests/JsonValueTests.cpp

@@ -73,12 +73,12 @@ namespace JsonGeneratorTests
             write("\t");
             assertResultIs("\"\\t\"");
         }
-        /*
+        
         TEST_METHOD(DoubleDefaultDigits)
         {
             write(3.14159265358979323846);
             assertResultIs("3.14");
-        }*/
+        }
 
         TEST_METHOD(DoubleZeroDigits)
         {