Merge pull request #391 from ORuban/388_Fix_DebugLogger_to_log_exception_details

Add Exception to DebugLogger output

Author: BrennanConroy

src/Microsoft.Extensions.Logging.Debug/DebugLogger.cs

@@ -71,6 +71,12 @@ public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Except
             }
 
             message = $"{ logLevel }: {message}";
+
+            if (exception != null)
+            {
+                message += Environment.NewLine + Environment.NewLine + exception.ToString();
+            }
+
             DebugWriteLine(message, _name);
         }