Found the following HTML validation problems:
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Collection.html:173:1 (Collection.Rd:174): Warning: <h5> anchor "Usage" already defined
Collection.html:189:1 (Collection.Rd:184): Warning: <h5> anchor "Usage" already defined
Collection.html:206:1 (Collection.Rd:195): Warning: <h5> anchor "Usage" already defined
Collection.html:222:1 (Collection.Rd:205): Warning: <h5> anchor "Usage" already defined
Collection.html:238:1 (Collection.Rd:215): Warning: <h5> anchor "Usage" already defined
Collection.html:254:1 (Collection.Rd:225): Warning: <h5> anchor "Usage" already defined
Collection.html:272:1 (Collection.Rd:237): Warning: <h5> anchor "Usage" already defined
Collection.html:289:1 (Collection.Rd:248): Warning: <h5> anchor "Usage" already defined
Collection.html:305:1 (Collection.Rd:258): Warning: <h5> anchor "Usage" already defined
Collection.html:321:1 (Collection.Rd:268): Warning: <h5> anchor "Usage" already defined
Collection.html:327:1 (Collection.Rd:272): Warning: <h5> anchor "Arguments" already defined
Collection.html:366:1 (Collection.Rd:301): Warning: <h5> anchor "Usage" already defined
Collection.html:372:1 (Collection.Rd:305): Warning: <h5> anchor "Arguments" already defined
Story.html:138:1 (Story.Rd:97): Warning: <h5> anchor "Usage" already defined
Story.html:154:1 (Story.Rd:107): Warning: <h5> anchor "Usage" already defined
Story.html:172:1 (Story.Rd:119): Warning: <h5> anchor "Usage" already defined
Story.html:189:1 (Story.Rd:130): Warning: <h5> anchor "Usage" already defined
Story.html:205:1 (Story.Rd:140): Warning: <h5> anchor "Usage" already defined
Story.html:221:1 (Story.Rd:150): Warning: <h5> anchor "Usage" already defined
Story.html:237:1 (Story.Rd:160): Warning: <h5> anchor "Usage" already defined
Story.html:255:1 (Story.Rd:172): Warning: <h5> anchor "Usage" already defined
Story.html:271:1 (Story.Rd:182): Warning: <h5> anchor "Usage" already defined
Story.html:287:1 (Story.Rd:192): Warning: <h5> anchor "Usage" already defined
Story.html:293:1 (Story.Rd:196): Warning: <h5> anchor "Arguments" already defined
Story.html:323:1 (Story.Rd:216): Warning: <h5> anchor "Usage" already defined
Story.html:329:1 (Story.Rd:220): Warning: <h5> anchor "Arguments" already defined
Theme.html:140:1 (Theme.Rd:106): Warning: <h5> anchor "Usage" already defined
Theme.html:156:1 (Theme.Rd:116): Warning: <h5> anchor "Usage" already defined
Theme.html:173:1 (Theme.Rd:127): Warning: <h5> anchor "Usage" already defined
Theme.html:190:1 (Theme.Rd:138): Warning: <h5> anchor "Usage" already defined
Theme.html:206:1 (Theme.Rd:148): Warning: <h5> anchor "Usage" already defined
Theme.html:222:1 (Theme.Rd:158): Warning: <h5> anchor "Usage" already defined
Theme.html:238:1 (Theme.Rd:168): Warning: <h5> anchor "Usage" already defined
Theme.html:254:1 (Theme.Rd:178): Warning: <h5> anchor "Usage" already defined
Theme.html:272:1 (Theme.Rd:190): Warning: <h5> anchor "Usage" already defined
Theme.html:292:1 (Theme.Rd:204): Warning: <h5> anchor "Usage" already defined
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Theme.html:314:1 (Theme.Rd:218): Warning: <h5> anchor "Arguments" already defined
Theme.html:344:1 (Theme.Rd:238): Warning: <h5> anchor "Usage" already defined
Theme.html:350:1 (Theme.Rd:242): Warning: <h5> anchor "Arguments" already defined
Themeset.html:129:1 (Themeset.Rd:110): Warning: <h5> anchor "Usage" already defined
Themeset.html:146:1 (Themeset.Rd:121): Warning: <h5> anchor "Usage" already defined
Themeset.html:162:1 (Themeset.Rd:131): Warning: <h5> anchor "Usage" already defined
Themeset.html:179:1 (Themeset.Rd:142): Warning: <h5> anchor "Usage" already defined
Themeset.html:195:1 (Themeset.Rd:152): Warning: <h5> anchor "Usage" already defined
Themeset.html:211:1 (Themeset.Rd:162): Warning: <h5> anchor "Usage" already defined
Themeset.html:217:1 (Themeset.Rd:166): Warning: <h5> anchor "Arguments" already defined
Themeset.html:256:1 (Themeset.Rd:195): Warning: <h5> anchor "Usage" already defined
Themeset.html:262:1 (Themeset.Rd:199): Warning: <h5> anchor "Arguments" already defined