Merge commit '9b0050e9aabe4be65c78ccf292a348f309d50ccd' as 'docs'

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

Closes #11925

docs/content/en/functions/strings/SliceString.md

@@ -0,0 +1,20 @@
+---
+title: strings.SliceString
+description: Creates a slice of a half-open range, including start and end indices.
+categories: []
+keywords: []
+action:
+  aliases: [slicestr]
+  related: []
+  returnType: string
+  signatures: ['strings.SliceString STRING START [END]']
+aliases: [/functions/slicestr]
+---
+
+For example, 1 and 4 creates a slice including elements 1 through 3.
+The `end` index can be omitted; it defaults to the string's length.
+
+```go-html-template
+{{ slicestr "BatMan" 3 }}` → Man
+{{ slicestr "BatMan" 0 3 }}` → Bat
+```