1 files changed, 19 insertions, 10 deletions
diff --git a/src/main/java/junit/framework/AssertionFailedError.java b/src/main/java/junit/framework/AssertionFailedError.java
index 0d7802c..e11fbec 100644
--- a/src/main/java/junit/framework/AssertionFailedError.java
+++ b/src/main/java/junit/framework/AssertionFailedError.java
@@ -5,16 +5,25 @@ package junit.framework;
  */
 public class AssertionFailedError extends AssertionError {
 
-	private static final long serialVersionUID= 1L;
+    private static final long serialVersionUID = 1L;
+    
+    /**
+     * Constructs a new AssertionFailedError without a detail message.
+     */
+    public AssertionFailedError() {
+    }
 
-	public AssertionFailedError() {
-	}
+    /**
+     * Constructs a new AssertionFailedError with the specified detail message.
+     * A null message is replaced by an empty String.
+     * @param message the detail message. The detail message is saved for later 
+     * retrieval by the {@code Throwable.getMessage()} method.
+     */
+    public AssertionFailedError(String message) {
+        super(defaultString(message));
+    }
 
-	public AssertionFailedError(String message) {
-		super(defaultString(message));
-	}
-
-	private static String defaultString(String message) {
-		return message == null ? "" : message;
-	}
+    private static String defaultString(String message) {
+        return message == null ? "" : message;
+    }
 }
 \ No newline at end of file