minor: extending doc for usage of NewLineAtEndOfFile.fileExtensions
minor: extending doc for usage of NewLineAtEndOfFile.fileExtensions

romani/checkstyle,rnveach/checkstyle,sharang108/checkstyle,checkstyle/checkstyle,romani/checkstyle,romani/checkstyle,checkstyle/checkstyle,sabaka/checkstyle,jonmbake/checkstyle,checkstyle/checkstyle,liscju/checkstyle,liscju/checkstyle,jochenvdv/checkstyle,rnveach/checkstyle,sabaka/checkstyle,ilanKeshet/checkstyle,ilanKeshet/checkstyle,liscju/checkstyle,rnveach/checkstyle,checkstyle/checkstyle,rnveach/checkstyle,romani/checkstyle,jonmbake/checkstyle,sabaka/checkstyle,ilanKeshet/checkstyle,romani/checkstyle,jonmbake/checkstyle,rnveach/checkstyle,sharang108/checkstyle,sharang108/checkstyle,jochenvdv/checkstyle,romani/checkstyle,checkstyle/checkstyle,checkstyle/checkstyle,jochenvdv/checkstyle,rnveach/checkstyle