Sync Composite to Java 25: H6 file labels, fix console output typo, README mapping

02-structural/composite/File.java

@@ -1,25 +1,18 @@
 package composite;
-
 /**
- * Leaf — a single file. It has no children.
- * getSize() returns its own size. print() shows its name.
- *
- * Notice: the File has no knowledge of directories or nesting.
- * It just knows its own name and size.
+ * Leaf — a single file with no children.
+ * getSize() returns its own bytes. print() outputs a single line.
+ * No knowledge of directories or nesting exists in this class.
  */
 public class File implements FileSystemItem {
-
     private final String name;
     private final long size;
-
     public File(String name, long sizeBytes) {
         this.name = name;
         this.size = sizeBytes;
     }
-
     @Override public String getName() { return name; }
     @Override public long   getSize() { return size; }
-
     @Override
     public void print(String indent) {
         System.out.printf("%s[FILE] %s (%,d bytes)%n", indent, name, size);