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