extract method: duplicates processing fixed (IDEA-105562)

java/java-tests/testData/refactoring/extractMethod/ArrayReturnType.java

@@ -0,0 +1,10 @@
+class Test {
+  String[] foos;
+
+  void test() {
+    for (String foo : <selection>foos</selection>) {
+
+    }
+    System.out.println(foos.length);
+  }
+}

java/java-tests/testData/refactoring/extractMethod/ArrayReturnType_after.java

@@ -0,0 +1,14 @@
+class Test {
+  String[] foos;
+
+  void test() {
+    for (String foo : newMethod()) {
+
+    }
+    System.out.println(newMethod().length);
+  }
+
+    private String[] newMethod() {
+        return foos;
+    }
+}