[java-inspections] DuplicateBranchesInSwitch: fix a comment

IJ-CR-101312

GitOrigin-RevId: 11e80499c55677cea9ba2c2c3d1dc0dd0f83124d

java/java-impl-inspections/src/com/intellij/codeInspection/DuplicateBranchesInSwitchInspection.java

@@ -385,19 +385,19 @@ public final class DuplicateBranchesInSwitchInspection extends LocalInspectionTo
              case R():
              case null:
              case S():
-               <caret>System.out.println(42); // Branch in 'switch' is a duplicate of the default branch
-               break;
+               <caret>return 42; // Branch in 'switch' is a duplicate of the default branch
              case String s:
-               System.out.println(0);
-               break;
+               return 0;
              default:
-               System.out.println(42);
+               return 42;
            }
 
            The 'case R():' and 'case S():' statements can be removed as redundant,
            because the corresponding branch is a duplicate of the default branch.
            But the 'default' case does not handle null values, so we cannot delete
            the 'case null:' and the 'return 42;' statement.
+
+           See com.intellij.java.codeInspection.DuplicateBranchesInSwitchFixTest [DeleteRedundantBranch7.java]
           */
           context.deleteStatements();
         }

java/java-tests/testData/inspection/duplicateBranchesInSwitchFix/afterDeleteRedundantBranch7.java

@@ -0,0 +1,16 @@
+// "Delete redundant 'switch' branch" "GENERIC_ERROR_OR_WARNING"
+class Test {
+    record R() {}
+    record S() {}
+
+    void foo(Object obj) {
+        switch (obj) {
+            case null:
+                return 42;
+            case String s:
+                return 0;
+            default:
+                return 42;
+      }
+    }
+}

java/java-tests/testData/inspection/duplicateBranchesInSwitchFix/beforeDeleteRedundantBranch7.java

@@ -0,0 +1,18 @@
+// "Delete redundant 'switch' branch" "GENERIC_ERROR_OR_WARNING"
+class Test {
+    record R() {}
+    record S() {}
+
+    void foo(Object obj) {
+        switch (obj) {
+            case R():
+            case null:
+            case S():
+                <caret>return 42;
+            case String s:
+                return 0;
+            default:
+                return 42;
+      }
+    }
+}