Found the following HTML validation problems:
slash.html:569:1 (slash.Rd:307): Warning: missing </ul> before </div>
slash.html:144:1 (slash.Rd:66): Warning: <h5> anchor "Usage" already defined
slash.html:150:1 (slash.Rd:70): Warning: <h5> anchor "Arguments" already defined
slash.html:165:1 (slash.Rd:79): Warning: <h5> anchor "Returns" already defined
slash.html:182:1 (slash.Rd:88): Warning: <h5> anchor "Usage" already defined
slash.html:188:1 (slash.Rd:92): Warning: <h5> anchor "Arguments" already defined
slash.html:203:1 (slash.Rd:101): Warning: <h5> anchor "Returns" already defined
slash.html:220:1 (slash.Rd:110): Warning: <h5> anchor "Usage" already defined
slash.html:226:1 (slash.Rd:114): Warning: <h5> anchor "Arguments" already defined
slash.html:239:1 (slash.Rd:121): Warning: <h5> anchor "Returns" already defined
slash.html:256:1 (slash.Rd:130): Warning: <h5> anchor "Usage" already defined
slash.html:262:1 (slash.Rd:134): Warning: <h5> anchor "Arguments" already defined
slash.html:275:1 (slash.Rd:141): Warning: <h5> anchor "Returns" already defined
slash.html:292:1 (slash.Rd:150): Warning: <h5> anchor "Usage" already defined
slash.html:298:1 (slash.Rd:154): Warning: <h5> anchor "Returns" already defined
slash.html:315:1 (slash.Rd:163): Warning: <h5> anchor "Usage" already defined
slash.html:321:1 (slash.Rd:167): Warning: <h5> anchor "Returns" already defined
slash.html:338:1 (slash.Rd:176): Warning: <h5> anchor "Usage" already defined
slash.html:344:1 (slash.Rd:180): Warning: <h5> anchor "Arguments" already defined
slash.html:367:1 (slash.Rd:193): Warning: <h5> anchor "Usage" already defined
slash.html:373:1 (slash.Rd:197): Warning: <h5> anchor "Arguments" already defined
slash.html:396:1 (slash.Rd:210): Warning: <h5> anchor "Usage" already defined
slash.html:402:1 (slash.Rd:214): Warning: <h5> anchor "Returns" already defined
slash.html:419:1 (slash.Rd:223): Warning: <h5> anchor "Usage" already defined
slash.html:425:1 (slash.Rd:227): Warning: <h5> anchor "Returns" already defined
slash.html:442:1 (slash.Rd:236): Warning: <h5> anchor "Usage" already defined
slash.html:448:1 (slash.Rd:240): Warning: <h5> anchor "Arguments" already defined
slash.html:461:1 (slash.Rd:247): Warning: <h5> anchor "Returns" already defined
slash.html:478:1 (slash.Rd:256): Warning: <h5> anchor "Usage" already defined
slash.html:484:1 (slash.Rd:260): Warning: <h5> anchor "Arguments" already defined
slash.html:500:1 (slash.Rd:270): Warning: <h5> anchor "Returns" already defined
slash.html:517:1 (slash.Rd:279): Warning: <h5> anchor "Usage" already defined
slash.html:523:1 (slash.Rd:283): Warning: <h5> anchor "Arguments" already defined
slash.html:546:1 (slash.Rd:296): Warning: <h5> anchor "Usage" already defined
slash.html:552:1 (slash.Rd:300): Warning: <h5> anchor "Arguments" already defined