Add spacing for better readability

Author: mythz

README.md

@@ -93,8 +93,11 @@ From v4.0.16 you can now use typed sql expressions in Custom SQL API's
 
 ```csharp
 List<Person> results = db.SqlList<Person>(db.From<Person>().Select("*").Where(q => q.Age < 50));
+
 List<string> results = db.SqlColumn<string>(db.From<Person>().Select(x => x.LastName);
+
 HashSet<int> results = db.ColumnDistinct<int>(db.From<Person>().Select(x => x.Age);
+
 int result = db.SqlScalar<int>(db.From<Person>().Select(Sql.Count("*")).Where(q => q.Age < 50));
 ```