fixed ptoblems

Author: DashProsh

app/src/main/java/hexlet/code/Differ.java

@@ -3,7 +3,13 @@
 import hexlet.code.formatters.Formatter;
 
 import java.io.IOException;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.TreeSet;
 
 
 public class Differ {