proper backlink and graph display in footer

jackyzha0

2021-07-18 6896cb007b073233f6012d535cfb6dcafa6109ab

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{{$trimmed := strings.TrimSuffix ".md" (.Destination | safeURL)}}
<a href="{{ if (hasPrefix $trimmed "/") }}{{ $trimmed }}{{ else }}{{ print "/" $trimmed }}{{ end }}" rel="noopener">{{ .Text | safeHTML }}</a>