Merge commit '9b0050e9aabe4be65c78ccf292a348f309d50ccd' as 'docs'

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

Closes #11925

docs/content/en/functions/go-template/not.md

@@ -0,0 +1,35 @@
+---
+title: not
+description: Returns the boolean negation of its single argument.
+categories: []
+keywords: []
+action:
+  aliases: []
+  related:
+    - functions/go-template/and
+    - functions/go-template/or
+  returnType: bool
+  signatures: [not VALUE]
+---
+
+Unlike the `and` and `or` operators, the `not` operator always returns a boolean value.
+
+```go-html-template
+{{ not true }} → false
+{{ not false }} → true
+
+{{ not 1 }} → false
+{{ not 0 }} → true
+
+{{ not "x" }} → false
+{{ not "" }} → true
+```
+
+Use the `not` operator, twice in succession, to cast any value to a boolean value. For example:
+
+```go-html-template
+{{ 42 | not | not }} → true
+{{ "" | not | not }} → false
+```
+
+{{% include "functions/go-template/_common/text-template.md" %}}