Found the following HTML validation problems:
adj2sg.html:46:1 (adj2sg.Rd:10): Warning: missing </ul> before </div>
as.sg.html:58:1 (as.sg.Rd:16): Warning: missing </ul> before </div>
as.sgadj.html:58:1 (as.sgadj.Rd:16): Warning: missing </ul> before </div>
as.sgc.html:58:1 (as.sgc.Rd:16): Warning: missing </ul> before </div>
cut.sg.html:61:1 (cut.sg.Rd:18): Warning: missing </ul> before </div>
edgeLengths.html:54:1 (edgeLengths.Rd:14): Warning: missing </ul> before </div>
is_sg.html:46:1 (is_sg.Rd:10): Warning: missing </ul> before </div>
plot.sg.html:94:1 (plot.sg.Rd:39): Warning: missing </ul> before </div>
plot.sgadj.html:53:1 (plot.sgadj.Rd:14): Warning: missing </ul> before </div>
plot.sgc.html:67:1 (plot.sgc.Rd:20): Warning: missing </ul> before </div>
plot.sgspectral.html:55:1 (plot.sgspectral.Rd:14): Warning: missing </ul> before </div>
plot3_sg.html:58:1 (plot3_sg.Rd:16): Warning: missing </ul> before </div>
print.sgadj.html:51:1 (print.sgadj.Rd:12): Warning: missing </ul> before </div>
print.sgc.html:51:1 (print.sgc.Rd:12): Warning: missing </ul> before </div>
sg2adj.html:46:1 (sg2adj.Rd:10): Warning: missing </ul> before </div>
sg2dxf.html:54:1 (sg2dxf.Rd:14): Warning: missing </ul> before </div>
sg2sparse.html:46:1 (sg2sparse.Rd:10): Warning: missing </ul> before </div>
sg2sym.html:52:1 (sg2sym.Rd:13): Warning: missing </ul> before </div>
sg2wadj.html:46:1 (sg2wadj.Rd:10): Warning: missing </ul> before </div>
sg_parse_coordinates.html:50:1 (sg_parse_coordinates.Rd:12): Warning: missing </ul> before </div>
sg_verify_parameters.html:66:1 (sg_verify_parameters.Rd:20): Warning: missing </ul> before </div>
shortestPath.html:62:1 (shortestPath.Rd:18): Warning: missing </ul> before </div>
sparse2sg.html:46:1 (sparse2sg.Rd:10): Warning: missing </ul> before </div>
spatcluster.html:54:1 (spatcluster.Rd:14): Warning: missing </ul> before </div>
spectral_sg.html:54:1 (spectral_sg.Rd:14): Warning: missing </ul> before </div>
summary.sg.html:51:1 (summary.sg.Rd:12): Warning: missing </ul> before </div>
summary.sgc.html:51:1 (summary.sgc.Rd:12): Warning: missing </ul> before </div>
t.sg.html:48:1 (t.sg.Rd:10): Warning: missing </ul> before </div>
t.sgadj.html:47:1 (t.sgadj.Rd:10): Warning: missing </ul> before </div>