Disable merging of 'if' statements when there are other staments in the outer one.

pkg/analysis_server/test/services/correction/assist_test.dart

Index: pkg/analysis_server/test/services/correction/assist_test.dart
diff --git a/pkg/analysis_server/test/services/correction/assist_test.dart b/pkg/analysis_server/test/services/correction/assist_test.dart
index 1d965e516a34c688c614649584d401f65f32caf4..8a9fc8aed1c67bb67954aafb04c0bec28771d532 100644
--- a/pkg/analysis_server/test/services/correction/assist_test.dart
+++ b/pkg/analysis_server/test/services/correction/assist_test.dart
@@ -2684,6 +2684,34 @@ main() {
     await assertNoAssistAt('if (1 ==', DartAssistKind.JOIN_IF_WITH_INNER);
   }
 
+  test_joinIfStatementInner_wrong_statementAfterInner() async {
+    resolveTestUnit('''
+main() {
+  if (1 == 1) {
+    if (2 == 2) {
+      print(2);
+    }
+    print(1);
+  }
+}
+''');
+    await assertNoAssistAt('if (1 ==', DartAssistKind.JOIN_IF_WITH_INNER);
+  }
+
+  test_joinIfStatementInner_wrong_statementBeforeInner() async {
+    resolveTestUnit('''
+main() {
+  if (1 == 1) {
+    print(1);
+    if (2 == 2) {
+      print(2);
+    }
+  }
+}
+''');
+    await assertNoAssistAt('if (1 ==', DartAssistKind.JOIN_IF_WITH_INNER);
+  }
+
   test_joinIfStatementInner_wrong_targetNotIf() async {
     resolveTestUnit('''
 main() {
@@ -2914,6 +2942,34 @@ main() {
     await assertNoAssistAt('if (2 == 2', DartAssistKind.JOIN_IF_WITH_OUTER);
   }
 
+  test_joinIfStatementOuter_wrong_statementAfterInner() async {
+    resolveTestUnit('''
+main() {
+  if (1 == 1) {
+    if (2 == 2) {
+      print(2);
+    }
+    print(1);
+  }
+}
+''');
+    await assertNoAssistAt('if (2 == 2', DartAssistKind.JOIN_IF_WITH_OUTER);
+  }
+
+  test_joinIfStatementOuter_wrong_statementBeforeInner() async {
+    resolveTestUnit('''
+main() {
+  if (1 == 1) {
+    print(1);
+    if (2 == 2) {
+      print(2);
+    }
+  }
+}
+''');
+    await assertNoAssistAt('if (2 == 2', DartAssistKind.JOIN_IF_WITH_OUTER);
+  }
+
   test_joinIfStatementOuter_wrong_targetNotIf() async {
     resolveTestUnit('''
 main() {