slightly better explanation of what a Higher Order Function is

Author: Yaskier

src/main/scala/stdlib/HigherOrderFunctions.scala

@@ -86,7 +86,10 @@ object HigherOrderFunctions
     result2 should be(res1)
   }
 
-  /** We can take that closure and throw it into a method and it will still hold the environment:
+  /** And then we get to Higher Order Functions:
+    * Higher Order Functions are functions that take functions as arguments and/or return functions.
+    *
+    *  We can take that closure and throw it into a Higher Order Function and it will still hold the environment:
    */
   def holdEnvironmentHigherOrderFunctions(res0: Int, res1: Int) {
     def summation(x: Int, y: Int ⇒ Int) = y(x)
@@ -102,7 +105,7 @@ object HigherOrderFunctions
     result2 should be(res1)
   }
 
-  /** Function returning another function:
+  /** Higher Order Function returning another function:
    */
   def returningFunctionHigherOrderFunctions(res0: Boolean, res1: Int, res2: Int) {
     def addWithoutSyntaxSugar(x: Int): Function1[Int, Int] = {