Squashed 'docs/' changes from 0f2bf195e..13097daf2

Squashed 'docs/' changes from 0f2bf195e..13097daf2

13097daf2 Update shortcode docs vs 0.55
9a7e19231 Update URL docs for relative URLs etc
bd58dd877 Adjust Output Formats docs
f3e9fbc00 Document output format `permalinkable`
3778ce689 Update partials.md
7b207a404 Partial: Update variable name in example
7d7b1f03c Document partials returning a value.
7ae93b7ca Merge branch 'temp552'
81910d266 releaser: Add release notes to /docs for release of 0.55.2
c166cef47 Fix typo
23adeb672 Point mmark links to its new repository
369a87339 Merge branch 'temp551'
eb6097e9f Bump to 0.55.1
766ee61a8 releaser: Add release notes to /docs for release of 0.55.1
a5a5f5d75 Start of taxonomy docs update for Hugo 0.55
fb5f75e9a Remove the space in `. RelPermalink`

git-subtree-dir: docs
git-subtree-split: 13097daf2e22fabfdb7528ca8709e86dba2b4a72