Update sorting/selection_sort_recursive.c

Co-authored-by: David Leal <halfpacho@gmail.com>

sorting/selection_sort_recursive.c

@@ -5,7 +5,7 @@
  * implementation using recursion.
  */
 #include <assert.h> /// for assert
-#include<stdio.h>   /// for IO operations
+#include <stdio.h>   /// for IO operations
 #include <stdlib.h> /// for dynamic memory allocation
 #include <time.h>   /// for random numbers generation
 #include <inttypes.h> /// for uint8_t