doc: remove include statement from comment

sorting/selection_sort_recursive.cpp

@@ -28,7 +28,7 @@
  */
 
 #include <algorithm>  /// for std::is_sorted
-#include <cassert>  /// for assert#include <cstdint>    /// for integral typedefs
+#include <cassert>  /// for assert
 #include <cstdint>   /// for integral typedefs
 #include <iostream>  /// for std::swap and io operations
 #include <vector>    /// for std::vector