Functor: rewrite map() javadoc

src/main/java/net/kemitix/mon/Functor.java

@@ -33,12 +33,12 @@ import java.util.function.Function;
 public interface Functor<T> {
 
     /**
-     * Map the content of the functor through the function.
+     * Applies the function to the value within the Functor, returning the result within a Functor.
      *
-     * @param f   the function
-     * @param <R> the type the functor maps to
+     * @param f   the function to apply
+     * @param <R> the type of the result of the function
      *
-     * @return the new functor
+     * @return a Functor containing the result of the function {@code f} applied to the value
      */
     <R> Functor<R> map(Function<T, R> f);
 }