fix comment in Slice(), negative indices are now supported
fix comment in Slice(), negative indices are now supported

PuerkitoBio/goquery,tjyang/goquery,yinzhiqiang/goquery,zhangheli/goquery,cmars/tools,tjyang/goquery,ASAPPinc/goquery,daemonchen/goquery,jjz/goquery,ASAPPinc/goquery,zhangheli/goquery,tjyang/goquery,cmars/tools,treejames/goquery,jjz/goquery,daemonchen/goquery,yinzhiqiang/goquery,zhangheli/goquery,jjz/goquery,daemonchen/goquery,yinzhiqiang/goquery,legendtkl/goquery,PuerkitoBio/goquery,ASAPPinc/goquery,qida/goquery,matrixik/goquery,treejames/goquery,mantyr/goquery,cmars/tools,treejames/goquery,qida/goquery,qida/goquery,mantyr/goquery,legendtkl/goquery,cmars/tools,legendtkl/goquery