fix sentence in new9p/doc.txt
fix sentence in new9p/doc.txt

grafov/godef,cmars/tools,lukehoban/godef,gonotes/godef,rogpeppe/godef,pepin/godef,cmars/tools,tw4452852/godef,abourget/godef,cmars/tools,ManojkumarV/godef,cmars/tools