docs + fix: broken partial and description of enableGitHubEdit

Jacky Zhao

2022-07-05 74993d19b72aee78e89b0b13b8f1d4a72fe5fe29

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{{if $.Site.Data.config.enableGitHubEdit}}
<a href="{{$.Site.Data.config.GitHubLink}}/{{.Path}}" rel="noopener">Edit Source</a>
{{end}}