Backport trivial changes

ortools/algorithms/python/knapsack_solver_test.py

@@ -12,8 +12,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# Copyright 2011 Google Inc. All Rights Reserved.
-
 """knapsack_solver unittest file."""
 
 from absl import app

ortools/algorithms/samples/Knapsack.java

@@ -17,11 +17,10 @@ package com.google.ortools.algorithms.samples;
 import com.google.ortools.Loader;
 import com.google.ortools.algorithms.KnapsackSolver;
 import java.util.ArrayList;
+
 // [END import]
 
-/**
- * Sample showing how to model using the knapsack solver.
- */
+/** Sample showing how to model using the knapsack solver. */
 public class Knapsack {
   private Knapsack() {}