resolved errors

Author: Darshan-Baligeri

src/main/java/com/thealgorithms/shufflealogrithm/UniquePairShuffle.java

@@ -57,3 +57,4 @@ static void main(String[] args) {
         }
     }
 }
+

src/test/java/com/thealgorithms/datastructures/trees/BinaryTreeTest.java

@@ -80,4 +80,5 @@ void test4() {
         Assertions.assertFalse(t.remove(398745987),
                 "Removing a nonexistent node should return false.");
     }
-}
+}
+

src/test/java/com/thealgorithms/shufflealgorithm/ConstrainedShuffleTest.java

@@ -109,3 +109,4 @@ void testArrayWithIdenticalElements() {
                 "Array with all identical elements should remain unchanged");
     }
 }
+

src/test/java/com/thealgorithms/shufflealgorithm/UniquePairShuffleTest.java

@@ -132,3 +132,4 @@ void testPairShuffleNegativeNumbers() {
         assertEquals(2, uniquePairs.size()); // Should have 2 unique pairs
     }
 }
+