Merge commit '7c62d6ef1654c0383eae474d3bd9ddf7754c1f30'

43 files changed, 253 insertions, 319 deletions

diff --git a/docs/config/_default/security.toml b/docs/config/_default/security.toml
index 2be3f1ba8..8bd91945f 100644
--- a/docs/config/_default/security.toml
+++ b/docs/config/_default/security.toml
@@ -1,10 +1,6 @@
 
   enableInlineShortcodes = false
 
-  [exec]
-    allow = ['^go$']
-    osEnv = ['^PATH$']
-
   [funcs]
     getenv = ['^HUGO_', '^REPOSITORY_URL$', '^BRANCH$']
 
diff --git a/docs/content/en/content-management/multilingual.md b/docs/content/en/content-management/multilingual.md
index 4c1f6446e..849df681f 100644
--- a/docs/content/en/content-management/multilingual.md
+++ b/docs/content/en/content-management/multilingual.md
@@ -506,7 +506,7 @@ See [lang.FormatNumber] and [lang.FormatNumberCustom] for details.
 With this template code:
 
 ```go-html-template
-{{ 512.5032 | lang.FormatPercent 2 }} ---> 512.50%
+{{ 512.5032 | lang.FormatPercent 2 }} → 512.50%
 ```
 
 The rendered page displays:
diff --git a/docs/content/en/content-management/summaries.md b/docs/content/en/content-management/summaries.md
index 4f94f95f2..74c5623cb 100644
--- a/docs/content/en/content-management/summaries.md
+++ b/docs/content/en/content-management/summaries.md
@@ -85,19 +85,19 @@ You can show content summaries with the following code. You could use the follow
 
 {{< code file="page-list-with-summaries.html" >}}
 {{ range first 10 .Pages }}
-    <article>
-      <!-- this <div> includes the title summary -->
-      <div>
-        <h2><a href="{{ .RelPermalink }}">{{ .Title }}</a></h2>
-        {{ .Summary }}
-      </div>
-      {{ if .Truncated }}
+  <article>
+    <!-- this <div> includes the title summary -->
+    <div>
+      <h2><a href="{{ .RelPermalink }}">{{ .Title }}</a></h2>
+      {{ .Summary }}
+    </div>
+    {{ if .Truncated }}
       <!-- This <div> includes a read more link, but only if the summary is truncated... -->
       <div>
         <a href="{{ .RelPermalink }}">Read More…</a>
       </div>
-      {{ end }}
-    </article>
+    {{ end }}
+  </article>
 {{ end }}
 {{< /code >}}
 
diff --git a/docs/content/en/content-management/toc.md b/docs/content/en/content-management/toc.md
index e1f24378e..ca179c77d 100644
--- a/docs/content/en/content-management/toc.md
+++ b/docs/content/en/content-management/toc.md
@@ -50,17 +50,17 @@ The following is an example of a very basic [single page template]:
 
 {{< code file="layout/_default/single.html" >}}
 {{ define "main" }}
-<main>
+  <main>
     <article>
-    <header>
+      <header>
         <h1>{{ .Title }}</h1>
-    </header>
-        {{ .Content }}
+      </header>
+      {{ .Content }}
     </article>
     <aside>
-        {{ .TableOfContents }}
+      {{ .TableOfContents }}
     </aside>
-</main>
+  </main>
 {{ end }}
 {{< /code >}}
 
diff --git a/docs/content/en/functions/adddate.md b/docs/content/en/functions/adddate.md
index 96a9df833..cae270fb8 100644
--- a/docs/content/en/functions/adddate.md
+++ b/docs/content/en/functions/adddate.md
@@ -13,11 +13,11 @@ relatedfuncs: [now]
 ```go-html-template
 {{ $d := "2022-01-01" | time.AsTime }}
 
-{{ $d.AddDate 0 0 1 | time.Format "2006-01-02" }} --> 2022-01-02
-{{ $d.AddDate 0 1 1 | time.Format "2006-01-02" }} --> 2022-02-02
-{{ $d.AddDate 1 1 1 | time.Format "2006-01-02" }} --> 2023-02-02
+{{ $d.AddDate 0 0 1 | time.Format "2006-01-02" }} → 2022-01-02
+{{ $d.AddDate 0 1 1 | time.Format "2006-01-02" }} → 2022-02-02
+{{ $d.AddDate 1 1 1 | time.Format "2006-01-02" }} → 2023-02-02
 
-{{ $d.AddDate -1 -1 -1 | time.Format "2006-01-02" }} --> 2020-11-30
+{{ $d.AddDate -1 -1 -1 | time.Format "2006-01-02" }} → 2020-11-30
 ```
 
 {{% note %}}
@@ -28,11 +28,11 @@ See [this explanation](https://github.com/golang/go/issues/31145#issuecomment-47
 
 ```go-html-template
 {{ $d := "2023-01-31" | time.AsTime }}
-{{ $d.AddDate 0 1 0 | time.Format "2006-01-02" }} --> 2023-03-03
+{{ $d.AddDate 0 1 0 | time.Format "2006-01-02" }} → 2023-03-03
 
 {{ $d := "2024-01-31" | time.AsTime }}
-{{ $d.AddDate 0 1 0 | time.Format "2006-01-02" }} --> 2024-03-02
+{{ $d.AddDate 0 1 0 | time.Format "2006-01-02" }} → 2024-03-02
 
 {{ $d := "2024-02-29" | time.AsTime }}
-{{ $d.AddDate 1 0 0 | time.Format "2006-01-02" }} --> 2025-03-01
+{{ $d.AddDate 1 0 0 | time.Format "2006-01-02" }} → 2025-03-01
 ```
diff --git a/docs/content/en/functions/after.md b/docs/content/en/functions/after.md
index 5318d3b0c..85aa6104d 100644
--- a/docs/content/en/functions/after.md
+++ b/docs/content/en/functions/after.md
@@ -33,7 +33,7 @@ You can use `after` in combination with the [`first` function] and Hugo's [power
   <h2>Featured Article</h2>
   {{ range first 1 .Pages.ByPublishDate.Reverse }}
   <header>
-      <h3><a href="{{ . Permalink }}">{{ .Title }}</a></h3>
+      <h3><a href="{{ .Permalink }}">{{ .Title }}</a></h3>
   </header>
   <p>{{ .Description }}</p>
 {{ end }}
diff --git a/docs/content/en/functions/anchorize.md b/docs/content/en/functions/anchorize.md
index bdf322a6e..51ef67bb2 100644
--- a/docs/content/en/functions/anchorize.md
+++ b/docs/content/en/functions/anchorize.md
@@ -15,10 +15,10 @@ If [Goldmark](/getting-started/configuration-markup#goldmark) is set as `default
 Since the `defaultMarkdownHandler` and this template function use the same sanitizing logic, you can use the latter to determine the ID of a header for linking with anchor tags.
 
 ```go-html-template
-{{ anchorize "This is a header" }} --> "this-is-a-header"
-{{ anchorize "This is also    a header" }} --> "this-is-also----a-header"
-{{ anchorize "main.go" }} --> "maingo"
-{{ anchorize "Article 123" }} --> "article-123"
-{{ anchorize "<- Let's try this, shall we?" }} --> "--lets-try-this-shall-we"
-{{ anchorize "Hello, 世界" }} --> "hello-世界"
+{{ anchorize "This is a header" }} → "this-is-a-header"
+{{ anchorize "This is also    a header" }} → "this-is-also----a-header"
+{{ anchorize "main.go" }} → "maingo"
+{{ anchorize "Article 123" }} → "article-123"
+{{ anchorize "<- Let's try this, shall we?" }} → "--lets-try-this-shall-we"
+{{ anchorize "Hello, 世界" }} → "hello-世界"
 ```
diff --git a/docs/content/en/functions/append.md b/docs/content/en/functions/append.md
index 626bc1242..6d7ffa245 100644
--- a/docs/content/en/functions/append.md
+++ b/docs/content/en/functions/append.md
@@ -26,4 +26,12 @@ The same example appending a slice to a slice:
 {{ $s = $s | append (slice "d" "e") }}
 ```
 
+If a slice contains other slices, further slices will be appended as values:
+
+```go-html-template
+{{ $s := slice (slice "a" "b") (slice "c" "d") }}
+{{ $s = $s | append (slice "e" "f") (slice "g" "h") }}
+{{/* $s now contains a [][]string containing four slices:  ["a" "b"],  ["c" "d"], ["e" "f"], and ["g" "h"] */}}
+```
+
 The `append` function works for all types, including `Pages`.
diff --git a/docs/content/en/functions/common/index.md b/docs/content/en/functions/common/index.md
new file mode 100644
index 000000000..cbb7365a6
--- /dev/null
+++ b/docs/content/en/functions/common/index.md
@@ -0,0 +1,3 @@
++++
+headless = true
++++
diff --git a/docs/content/en/functions/common/regular-expressions.md b/docs/content/en/functions/common/regular-expressions.md
new file mode 100644
index 000000000..9da340849
--- /dev/null
+++ b/docs/content/en/functions/common/regular-expressions.md
@@ -0,0 +1,8 @@
+When specifying the regular expression, use a raw [string literal] (backticks) instead of an interpreted string literal (double quotes) to simplify the syntax. With an interpreted string literal you must escape backslashes.
+
+Go's regular expression package implements the [RE2 syntax]. The RE2 syntax is a subset of that accepted by [PCRE], roughly speaking, and with various [caveats]. Note that the RE2 `\C` escape sequence is not supported.
+
+[caveats]: https://swtch.com/~rsc/regexp/regexp3.html#caveats
+[PCRE]: https://www.pcre.org/
+[RE2 syntax]: https://github.com/google/re2/wiki/Syntax/
+[string literal]: https://go.dev/ref/spec#String_literals
diff --git a/docs/content/en/functions/fileExists.md b/docs/content/en/functions/fileExists.md
index 5a365b7c1..f7b5c37e0 100644
--- a/docs/content/en/functions/fileExists.md
+++ b/docs/content/en/functions/fileExists.md
@@ -24,11 +24,11 @@ content/
 The function returns these values:
 
 ```go-html-template
-{{ os.FileExists "content" }} --> true
-{{ os.FileExists "content/news" }} --> true
-{{ os.FileExists "content/news/article-1" }} --> false
-{{ os.FileExists "content/news/article-1.md" }} --> true
-{{ os.FileExists "news" }} --> true
-{{ os.FileExists "news/article-1" }} --> false
-{{ os.FileExists "news/article-1.md" }} --> true
+{{ os.FileExists "content" }} → true
+{{ os.FileExists "content/news" }} → true
+{{ os.FileExists "content/news/article-1" }} → false
+{{ os.FileExists "content/news/article-1.md" }} → true
+{{ os.FileExists "news" }} → true
+{{ os.FileExists "news/article-1" }} → false
+{{ os.FileExists "news/article-1.md" }} → true
 ```
diff --git a/docs/content/en/functions/findRe.md b/docs/content/en/functions/findRe.md
index 0b8978ec6..3c977118c 100644
--- a/docs/content/en/functions/findRe.md
+++ b/docs/content/en/functions/findRe.md
@@ -13,21 +13,7 @@ relatedfuncs: [findRESubmatch, replaceRE]
 ---
 By default, `findRE` finds all matches. You can limit the number of matches with an optional LIMIT parameter.
 
-When specifying the regular expression, use a raw [string literal] (backticks) instead of an interpreted string literal (double quotes) to simplify the syntax. With an interpreted string literal you must escape backslashes.
-
-[string literal]: https://go.dev/ref/spec#String_literals
-
-This function uses the [RE2] regular expression library. See the [RE2 syntax documentation] for details. Note that the RE2 `\C` escape sequence is not supported.
-
-[RE2]: https://github.com/google/re2/
-[RE2 syntax documentation]: https://github.com/google/re2/wiki/Syntax/
-
-{{% note %}}
-The RE2 syntax is a subset of that accepted by [PCRE], roughly speaking, and with various [caveats].
-
-[caveats]: https://swtch.com/~rsc/regexp/regexp3.html#caveats
-[PCRE]: https://www.pcre.org/
-{{% /note %}}
+{{% readfile file="/functions/common/regular-expressions.md" %}}
 
 This example returns a slice of all second level headings (`h2` elements) within the rendered `.Content`:
 
diff --git a/docs/content/en/functions/findresubmatch.md b/docs/content/en/functions/findresubmatch.md
index e1085a9c9..1f0f26b49 100644
--- a/docs/content/en/functions/findresubmatch.md
+++ b/docs/content/en/functions/findresubmatch.md
@@ -14,21 +14,7 @@ relatedfuncs: [findRE, replaceRE]
 
 By default, `findRESubmatch` finds all matches. You can limit the number of matches with an optional LIMIT parameter. A return value of nil indicates no match.
 
-When specifying the regular expression, use a raw [string literal] (backticks) instead of an interpreted string literal (double quotes) to simplify the syntax. With an interpreted string literal you must escape backslashes.
-
-[string literal]: https://go.dev/ref/spec#String_literals
-
-This function uses the [RE2] regular expression library. See the [RE2 syntax documentation] for details. Note that the RE2 `\C` escape sequence is not supported.
-
-[RE2]: https://github.com/google/re2/
-[RE2 syntax documentation]: https://github.com/google/re2/wiki/Syntax/
-
-{{% note %}}
-The RE2 syntax is a subset of that accepted by [PCRE], roughly speaking, and with various [caveats].
-
-[caveats]: https://swtch.com/~rsc/regexp/regexp3.html#caveats
-[PCRE]: https://www.pcre.org/
-{{% /note %}}
+{{% readfile file="/functions/common/regular-expressions.md" %}}
 
 ## Demonstrative examples
 
diff --git a/docs/content/en/functions/getenv.md b/docs/content/en/functions/getenv.md
index e014b7ad5..daeeb6532 100644
--- a/docs/content/en/functions/getenv.md
+++ b/docs/content/en/functions/getenv.md
@@ -12,8 +12,8 @@ relatedfuncs: []
 Examples:
 
 ```go-html-template
-{{ os.Getenv "HOME" }} --> /home/victor
-{{ os.Getenv "USER" }} --> victor
+{{ os.Getenv "HOME" }} → /home/victor
+{{ os.Getenv "USER" }} → victor
 ```
 
 You can pass values when building your site:
@@ -31,8 +31,8 @@ hugo
 And then retrieve the values within a template:
 
 ```go-html-template
-{{ os.Getenv "MY_VAR1" }} --> foo
-{{ os.Getenv "MY_VAR2" }} --> bar
+{{ os.Getenv "MY_VAR1" }} → foo
+{{ os.Getenv "MY_VAR2" }} → bar
 ```
 
 With Hugo v0.91.0 and later, you must explicitly allow access to environment variables. For details, review [Hugo's Security Policy](/about/security-model/#security-policy). By default, environment variables beginning with `HUGO_` are allowed when using the `os.Getenv` function.
diff --git a/docs/content/en/functions/hasPrefix.md b/docs/content/en/functions/hasPrefix.md
deleted file mode 100644
index 264044577..000000000
--- a/docs/content/en/functions/hasPrefix.md
+++ /dev/null
@@ -1,20 +0,0 @@
----
-title: hasprefix
-description: Tests whether a string begins with prefix.
-date: 2017-02-01
-publishdate: 2017-02-01
-lastmod: 2017-02-01
-categories: [functions]
-menu:
-  docs:
-    parent: "functions"
-keywords: [strings]
-signature: ["hasPrefix STRING PREFIX"]
-workson: []
-hugoversion:
-relatedfuncs: [hasSuffix]
-deprecated: false
-aliases: []
----
-
-* `{{ hasPrefix "Hugo" "Hu" }}` → true
diff --git a/docs/content/en/functions/hasSuffix.md b/docs/content/en/functions/hasSuffix.md
deleted file mode 100644
index 5ab38866d..000000000
--- a/docs/content/en/functions/hasSuffix.md
+++ /dev/null
@@ -1,21 +0,0 @@
----
-title: hassuffix
-linkTitle: hasSuffix
-description: Tests whether a string ends with suffix.
-date: 2023-03-01
-publishdate: 2023-03-01
-lastmod: 2023-03-01
-categories: [functions]
-menu:
-docs:
-parent: "functions"
-keywords: [strings]
-signature: ["hasSuffix STRING SUFFIX"]
-workson: []
-hugoversion:
-relatedfuncs: [hasPrefix]
-deprecated: false
-aliases: []
----
-
-* `{{ hasSuffix "Hugo" "go" }}` → true
diff --git a/docs/content/en/functions/merge.md b/docs/content/en/functions/merge.md
index 68e561450..ed370549e 100644
--- a/docs/content/en/functions/merge.md
+++ b/docs/content/en/functions/merge.md
@@ -27,9 +27,9 @@ Example 1
 ```go-html-template
 {{ $merged := merge $m1 $m2 $m3 }}
 
-{{ $merged.x }}   --> baz
-{{ $merged.y }}   --> wobble
-{{ $merged.z.a }} --> huey
+{{ $merged.x }}   → baz
+{{ $merged.y }}   → wobble
+{{ $merged.z.a }} → huey
 ```
 
 Example 2
@@ -37,9 +37,9 @@ Example 2
 ```go-html-template
 {{ $merged := merge $m3 $m2 $m1 }}
 
-{{ $merged.x }}   --> foo
-{{ $merged.y }}   --> wibble
-{{ $merged.z.a }} --> huey
+{{ $merged.x }}   → foo
+{{ $merged.y }}   → wibble
+{{ $merged.z.a }} → huey
 ```
 
 Example 3
@@ -47,9 +47,9 @@ Example 3
 ```go-html-template
 {{ $merged := merge $m2 $m3 $m1 }}
 
-{{ $merged.x }}   --> foo
-{{ $merged.y }}   --> wobble
-{{ $merged.z.a }} --> huey
+{{ $merged.x }}   → foo
+{{ $merged.y }}   → wobble
+{{ $merged.z.a }} → huey
 ```
 
 Example 4
@@ -57,9 +57,9 @@ Example 4
 ```go-html-template
 {{ $merged := merge $m1 $m3 $m2 }}
 
-{{ $merged.x }}   --> bar
-{{ $merged.y }}   --> wibble
-{{ $merged.z.a }} --> huey
+{{ $merged.x }}   → bar
+{{ $merged.y }}   → wibble
+{{ $merged.z.a }} → huey
 ```
 
 {{% note %}}
diff --git a/docs/content/en/functions/os.Stat.md b/docs/content/en/functions/os.Stat.md
index 9ace3b8bf..51d35ae2f 100644
--- a/docs/content/en/functions/os.Stat.md
+++ b/docs/content/en/functions/os.Stat.md
@@ -13,13 +13,13 @@ The `os.Stat` function attempts to resolve the path relative to the root of your
 
 ```go-html-template
 {{ $f := os.Stat "README.md" }}
-{{ $f.IsDir }}    --> false (bool)
-{{ $f.ModTime }}  --> 2021-11-25 10:06:49.315429236 -0800 PST (time.Time)
-{{ $f.Name }}     --> README.md (string)
-{{ $f.Size }}     --> 241 (int64)
+{{ $f.IsDir }}    → false (bool)
+{{ $f.ModTime }}  → 2021-11-25 10:06:49.315429236 -0800 PST (time.Time)
+{{ $f.Name }}     → README.md (string)
+{{ $f.Size }}     → 241 (int64)
 
 {{ $d := os.Stat "content" }}
-{{ $d.IsDir }}    --> true (bool)
+{{ $d.IsDir }}    → true (bool)
 ```
 
 Details of the `FileInfo` structure are available in the [Go documentation](https://pkg.go.dev/io/fs#FileInfo).
diff --git a/docs/content/en/functions/readdir.md b/docs/content/en/functions/readdir.md
index 9fc4d3013..a76e3c5f6 100644
--- a/docs/content/en/functions/readdir.md
+++ b/docs/content/en/functions/readdir.md
@@ -26,7 +26,7 @@ This template code:
 
 ```go-html-template
 {{ range os.ReadDir "content" }}
-  {{ .Name }} --> {{ .IsDir }}
+  {{ .Name }} → {{ .IsDir }}
 {{ end }}
 ```
 
diff --git a/docs/content/en/functions/replacere.md b/docs/content/en/functions/replacere.md
index 22f81a2f5..8c3cc13c2 100644
--- a/docs/content/en/functions/replacere.md
+++ b/docs/content/en/functions/replacere.md
@@ -13,21 +13,7 @@ relatedfuncs: [findRE, FindRESubmatch, replace]
 ---
 By default, `replaceRE` replaces all matches. You can limit the number of matches with an optional LIMIT parameter.
 
-When specifying the regular expression, use a raw [string literal] (backticks) instead of an interpreted string literal (double quotes) to simplify the syntax. With an interpreted string literal you must escape backslashes.
-
-[string literal]: https://go.dev/ref/spec#String_literals
-
-This function uses the [RE2] regular expression library. See the [RE2 syntax documentation] for details. Note that the RE2 `\C` escape sequence is not supported.
-
-[RE2]: https://github.com/google/re2/
-[RE2 syntax documentation]: https://github.com/google/re2/wiki/Syntax/
-
-{{% note %}}
-The RE2 syntax is a subset of that accepted by [PCRE], roughly speaking, and with various [caveats].
-
-[caveats]: https://swtch.com/~rsc/regexp/regexp3.html#caveats
-[PCRE]: https://www.pcre.org/
-{{% /note %}}
+{{% readfile file="/functions/common/regular-expressions.md" %}}