/src/main/java/org/htmlunit/html/xpath/XPathAdapter.java
if ( DOUBLE_QUOTED == STATE.SINGLE_QUOTED) {
else if ( state == STATE.SINGLE_QUOTED ) {
} break; case '\'': if (state == STATE.DEFAULT || state == STATE.ATTRIB) { state = STATE.SINGLE_QUOTED; } <extra_id_0> state = STATE.DEFAULT; } break; case '[': case '(': if (state == STATE.ATTRIB) {