Merge commit '9b0050e9aabe4be65c78ccf292a348f309d50ccd' as 'docs'

```
git subtree add --prefix=docs/ https://github.com/gohugoio/hugoDocs.git master --squash
```

Closes #11925

docs/content/en/methods/page/_common/_index.md

@@ -0,0 +1,13 @@
+---
+cascade:
+  _build:
+    list: never
+    publishResources: false
+    render: never
+---
+
+<!--
+Files within this headless branch bundle are markdown snippets. Each file must contain front matter delimiters, though front matter fields are not required.
+
+Include the rendered content using the "include" shortcode. 
+-->

docs/content/en/methods/page/_common/definition-of-section.md

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+---
+# Do not remove front matter.
+---
+
+A _section_ is a top-level content directory, or any content directory with an _index.md file.

docs/content/en/methods/page/_common/output-format-definition.md

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+---
+# Do not remove front matter.
+---
+
+Hugo generates one or more files per page when building a site. For example, when rendering home, [section], [taxonomy], and [term] pages, Hugo generates an HTML file and an RSS file. Both HTML and RSS are built-in _output formats_. Create multiple output formats, and control generation based on [page kind], or by enabling one or more output formats for one or more pages. See [details].
+
+[section]: /getting-started/glossary/#section
+[taxonomy]: /getting-started/glossary/#taxonomy
+[term]: /getting-started/glossary/#term
+[page kind]: /getting-started/glossary/#page-kind
+[details]: /templates/output-formats

docs/content/en/methods/page/_common/output-format-methods.md

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+---
+# Do not remove front matter.
+---
+
+Get IDENTIFIER
+: (`any`) Returns the `OutputFormat` object with the given identifier.
+
+MediaType
+: (`media.Type`) Returns the media type of the output format.
+
+MediaType.MainType
+: (`string`) Returns the main type of the output format's media type.
+
+MediaType.SubType
+: (`string`) Returns the subtype of the current format's media type.
+
+Name
+: (`string`) Returns the output identifier of the output format.
+
+Permalink
+: (`string`) Returns the permalink of the page generated by the current output format.
+
+Rel
+: (`string`) Returns the `rel` value of the output format, either the default or as defined in the site configuration.
+
+RelPermalink
+: (`string`) Returns the relative permalink of the page generated by the current output format.

docs/content/en/methods/page/_common/scratch-methods.md

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+---
+# Do not remove front matter.
+---
+
+## Methods
+
+###### Set
+
+Sets the value of a given key.
+
+```go-html-template
+{{ .Scratch.Set "greeting" "Hello" }}
+```
+
+###### Get
+
+Gets the value of a given key.
+
+```go-html-template
+{{ .Scratch.Set "greeting" "Hello" }}
+{{ .Scratch.Get "greeting" }} → Hello
+```
+
+###### Add
+
+Adds a given value to existing value(s) of the given key.
+
+For single values, `Add` accepts values that support Go's `+` operator. If the first `Add` for a key is an array or slice, the following adds will be appended to that list.
+
+```go-html-template
+{{ .Scratch.Set "greeting" "Hello" }}
+{{ .Scratch.Add "greeting" "Welcome" }}
+{{ .Scratch.Get "greeting" }} → HelloWelcome
+```
+
+```go-html-template
+{{ .Scratch.Set "total" 3 }}
+{{ .Scratch.Add "total" 7 }}
+{{ .Scratch.Get "total" }} → 10
+```
+
+```go-html-template
+{{ .Scratch.Set "greetings" (slice "Hello") }}
+{{ .Scratch.Add "greetings" (slice "Welcome" "Cheers") }}
+{{ .Scratch.Get "greetings" }} → [Hello Welcome Cheers]
+```
+
+###### SetInMap
+
+Takes a `key`, `mapKey` and `value` and adds a map of `mapKey` and `value` to the given `key`.
+
+```go-html-template
+{{ .Scratch.SetInMap "greetings" "english" "Hello" }}
+{{ .Scratch.SetInMap "greetings" "french" "Bonjour" }}
+{{ .Scratch.Get "greetings" }} → map[english:Hello french:Bonjour]
+```
+
+###### DeleteInMap
+
+Takes a `key` and `mapKey` and removes the map of `mapKey` from the given `key`.
+
+```go-html-template
+{{ .Scratch.SetInMap "greetings" "english" "Hello" }}
+{{ .Scratch.SetInMap "greetings" "french" "Bonjour" }}
+{{ .Scratch.DeleteInMap "greetings" "english" }}
+{{ .Scratch.Get "greetings" }} → map[french:Bonjour]
+```
+
+###### GetSortedMapValues
+
+Returns an array of values from `key` sorted by `mapKey`.
+
+```go-html-template
+{{ .Scratch.SetInMap "greetings" "english" "Hello" }}
+{{ .Scratch.SetInMap "greetings" "french" "Bonjour" }}
+{{ .Scratch.GetSortedMapValues "greetings" }} → [Hello Bonjour]
+```
+
+###### Delete
+
+Removes the given key.
+
+```go-html-template
+{{ .Scratch.Set "greeting" "Hello" }}
+{{ .Scratch.Delete "greeting" }}
+```