@Test
 public void testCleanInput() {
   assertEquals("test1\ntest2", AsciidoctorRenderer.cleanJavadocInput("  test1\n test2\n"));
   assertEquals("@", AsciidoctorRenderer.cleanJavadocInput("{@literal @}"));
   assertEquals("/*\ntest\n*/", AsciidoctorRenderer.cleanJavadocInput("/*\ntest\n*\\/"));
   assertEquals("@", AsciidoctorRenderer.cleanJavadocInput("{at}"));
   assertEquals("/", AsciidoctorRenderer.cleanJavadocInput("{slash}"));
 }