Java: Don't fold method parameters when replacing duplicate fragments (IDEA-179519, IDEA-180673)

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

@@ -0,0 +1,26 @@
+class RenamedParameter {
+    private boolean c;
+
+    public void foo() {
+        String a = "s";
+        String b = "t";
+        newMethod(a, b);
+    }
+
+    private void newMethod(String a, String b) {
+        if (c) {
+            String t = b;
+            x(t);
+        } else if (!b.equals(a)) {
+            x(b);
+        }
+    }
+
+    public void bar() {
+        String a = "t";
+        String b = "s";
+        newMethod(a, b);
+    }
+
+    void x(String s) {}
+}