Merge pull request eugenp#17079 from Michaelin007/logback

https://jira.baeldung.com/browse/BAEL-7847

Author: Maiklins

logging-modules/logback/pom.xml

@@ -99,8 +99,8 @@
         <docx4j.version>3.3.5</docx4j.version>
         <angus.mail.version>2.0.1</angus.mail.version>
         <angus.activation.version>2.0.0</angus.activation.version>
-        <logback.version>1.4.8</logback.version>
-        <slf4j.version>2.0.4</slf4j.version>
+        <logback.version>1.5.6</logback.version>
+        <slf4j.version>2.1.0-alpha1</slf4j.version>
     </properties>
 
 </project>

logging-modules/logback/src/main/java/com/baeldung/logback/MapAppender.java

@@ -9,8 +9,7 @@
 
 public class MapAppender extends AppenderBase<ILoggingEvent> {
 
-    private final ConcurrentMap<String, ILoggingEvent> eventMap
-      = new ConcurrentHashMap<>();
+    private final ConcurrentMap<String, ILoggingEvent> eventMap = new ConcurrentHashMap<>();
 
     private String prefix;