refactor: 줄바꿈, 잘못된 클래스 이름 수정

Author: jaewoo9797

codeit-bootcamp-spring/1-sprint-mission/src/main/java/com/sprint/mission/discodeit/domain/channel/Channel.java

@@ -67,6 +67,7 @@ public void updateSubject(String subject) {
         this.subject = subject;
     }
 
+
     public void updateName(String name) {
         this.name = name.trim();
     }

codeit-bootcamp-spring/1-sprint-mission/src/main/java/com/sprint/mission/discodeit/domain/channel/ParticipatedUser.java

@@ -20,6 +20,6 @@ public void removeUser(User user) {
     }
 
     public Set<UUID> getParticipatedUserId() {
-        return Collections.unmodifiableSet(users.keySet());
+        return Set.copyOf(users.keySet());
     }
 }

codeit-bootcamp-spring/1-sprint-mission/src/main/java/com/sprint/mission/discodeit/domain/user/BirthDate.java

@@ -6,6 +6,7 @@
 import java.util.Objects;
 
 public class BirthDate {
+
     private static final int MIN_AGE_RESTRICT = 13;
 
     private final LocalDate value;

codeit-bootcamp-spring/1-sprint-mission/src/main/java/com/sprint/mission/discodeit/repository/user/ChannelInMemoryRepository.java renamed to codeit-bootcamp-spring/1-sprint-mission/src/main/java/com/sprint/mission/discodeit/repository/user/UserInMemoryRepository.java

@@ -12,7 +12,7 @@
 import org.springframework.stereotype.Repository;
 
 @Repository
-public class ChannelInMemoryRepository implements UserRepository {
+public class UserInMemoryRepository implements UserRepository {
 
     Map<UUID, User> uuidUsers = new HashMap<>();
     Map<Email, User> emailUsers = new HashMap<>();