move JoinLinesTest to java-tests

java/java-tests/testData/codeInsight/joinLines/WrongWrapping_after.java

@@ -0,0 +1,20 @@
+import javax.swing.*;
+import java.awt.*;
+
+class Foo {
+    void foo (){
+        ButtonWithExtension button = new ButtonWithExtension("", "", "", "");
+    }
+  
+  private abstract class MyActionButton extends JComponent{
+    protected MyActionButton(String s1, String s2, String s3, String s4) {
+    }
+  }
+  
+  private class ButtonWithExtension extends MyActionButton {
+    protected ButtonWithExtension(String s1, String s2, String s3, String s4) {
+      super(s1, s2, s3, s4);
+    }
+  }
+  
+}