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/Trim.md

@@ -0,0 +1,59 @@
+---
+title: strings.Trim
+description: Returns the given string, removing leading and trailing characters specified in the cutset.
+categories: []
+keywords: []
+action:
+  aliases: [trim]
+  related:
+    - functions/strings/Chomp
+    - functions/strings/TrimLeft
+    - functions/strings/TrimPrefix
+    - functions/strings/TrimRight
+    - functions/strings/TrimSuffix
+  returnType: string
+  signatures: [strings.Trim INPUT CUTSET]
+aliases: [/functions/trim]
+---
+
+```go-html-template
+{{ trim "++foo--" "+-" }} → foo
+```
+
+To remove leading and trailing newline characters and carriage returns:
+
+```go-html-template
+{{ trim "\nfoo\n" "\n\r" }} → foo
+{{ trim "\n\nfoo\n\n" "\n\r" }} → foo
+
+{{ trim "\r\nfoo\r\n" "\n\r" }} → foo
+{{ trim "\r\n\r\nfoo\r\n\r\n" "\n\r" }} → foo
+```
+
+The `strings.Trim` function is commonly used in shortcodes to remove leading and trailing newlines characters and carriage returns from the content within the opening and closing shortcode tags.
+
+For example, with this markdown:
+
+```text
+{{</* my-shortcode */>}}
+Able was I ere I saw Elba.
+{{</* /my-shortcode */>}}
+```
+
+The value of `.Inner` in the shortcode template is:
+
+```text
+\nAble was I ere I saw Elba.\n
+```
+
+If authored on a Windows system the value of `.Inner` might, depending on the editor configuration, be:
+
+```text
+\r\nAble was I ere I saw Elba.\r\n
+```
+
+This construct is common in shortcode templates:
+
+```go-html-template
+{{ trim .Inner "\n\r" }}
+```