assertFalse(pattern.matcher("application/xhtml+xml").matches());
        assertFalse(pattern.matcher("application/rdf+xml").matches());
    }

    @Test
    public void test_escapedPlusDoesMatch() {
        // Demonstrate the fix when + is properly escaped
        String correctPattern = "(application/xhtml\\+xml|application/rdf\\+xml)";
        Pattern pattern = Pattern.compile(correctPattern);