add proper syntax highlighting for returned data

.sonarcloud.properties

@@ -0,0 +1 @@
+sonar.exclusions=saltgui/static/highlight/**

docs/README.md

@@ -682,3 +682,4 @@ SaltGUI includes these libraries (with possible modifications):
 * [sorttable](https://www.kryogenix.org/code/browser/sorttable/)
 * [search-highlight](https://www.the-art-of-web.com/javascript/search-highlight/)
 * [jsonpath](https://www.w3resource.com/JSON/JSONPath-with-JavaScript.php)
+* [highlight](https://www.highlightjs.org/)

saltgui/index.html

@@ -18,6 +18,7 @@
     <link rel='stylesheet' type='text/css' href='static/stylesheets/options.css'/>
     <link rel='stylesheet' type='text/css' href='static/stylesheets/events.css'/>
     <link rel='stylesheet' type='text/css' href='static/sorttable/sorttable.css'/>
+    <link rel='stylesheet' type='text/css' href='static/highlight/styles/default.min.css'/>
     <link rel='shortcut icon' href='static/images/icon.png'/>
   </head>
 

saltgui/static/highlight-update.sh

@@ -0,0 +1,27 @@
+#!/bin/sh
+
+# part of SaltGUI
+# to be run by maintainers to update the "highlight" package
+
+set -x
+
+[ -f /tmp/highlight.zip ] ||
+	wget -O /tmp/highlight.zip --header='Content-Type: application/json' --post-data='{"api":2,"languages":["json","yaml"]}' https://highlightjs.org/api/download
+
+# remove previous edition
+git rm -r -f highlight
+# just in case is was deleted or not yet there
+mkdir --parent highlight
+# unzip the downloaded file
+(cd highlight && unzip -q /tmp/highlight.zip)
+# add it to git
+git add highlight
+
+# cleanup
+rm /tmp/highlight.zip
+
+# show the result (summary)
+git status
+git diff --cached highlight/es/core.js
+
+# End

saltgui/static/highlight/DIGESTS.md

@@ -0,0 +1,33 @@
+## Subresource Integrity
+
+If you are loading Highlight.js via CDN you may wish to use [Subresource Integrity](https://developer.mozilla.org/en-US/docs/Web/Security/Subresource_Integrity) to guarantee that you are using a legimitate build of the library.
+
+To do this you simply need to add the `integrity` attribute for each JavaScript file you download via CDN. These digests are used by the browser to confirm the files downloaded have not been modified.
+
+```html
+<script
+  src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/11.10.0/highlight.min.js"
+  integrity="sha384-pGqTJHE/m20W4oDrfxTVzOutpMhjK3uP/0lReY0Jq/KInpuJSXUnk4WAYbciCLqT"></script>
+<!-- including any other grammars you might need to load -->
+<script
+  src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/11.10.0/languages/go.min.js"
+  integrity="sha384-Mtb4EH3R9NMDME1sPQALOYR8KGqwrXAtmc6XGxDd0XaXB23irPKsuET0JjZt5utI"></script>
+```
+
+The full list of digests for every file can be found below.
+
+### Digests
+
+```
+sha384-R87hRh4kF8+iz2sB6FvLrfR0XZBohjFXeJKIXld1Eji2UVi+M2+OIgJKma/9Ko6u /es/languages/json.js
+sha384-QFDPNpqtrgZCuAr70TZJFM4VCY+xNnyGKwJw2EsWIBJOVcWAns9PHcLzecyDVv+x /es/languages/json.min.js
+sha384-40MP6/ECSjYaTAIf+/ibE2FPeFPQ53WbASndXxMOcXiQtgLbGXUStZVuPSngp7OD /es/languages/yaml.js
+sha384-vXmhozexi2dHQBoniIEbWI5ZqDxyVfUs96BUGpqjWL1aberSp9pyxbvK8WCNASGB /es/languages/yaml.min.js
+sha384-psmmPlbfEWGyvRapexDqkVTgNz7Y1xvlGdLNWQSafI4GFQYFDXPZxVXH1laU4n6l /languages/json.js
+sha384-Bb6DhE3tUpBROwypL78TbhRUs9QbCt2GxcxVSYglt2l3MefrYkm4CfwjfWhRfQaX /languages/json.min.js
+sha384-3KIoWvJ5JGRH35WAkzreEebY8sug+ZWeaOPS2r1KIfznEU9TtPFpxX6sIgtaiA9G /languages/yaml.js
+sha384-bMkvdnz+wPu1ro0fqO3BaDWztc7RzSvw05MQFP6bhJKDcwpkrFYTfTFI9ndkP11l /languages/yaml.min.js
+sha384-K/lmlGQ1csQn1mpVy2e8KFC/I4UCJeKBL/puxNMhryz5acaA340QirqJpbtwfunZ /highlight.js
+sha384-wZNnxh6Gd4U6ufGOj7cOmK8M/H4Vfs81NXsomfxq45v4e3jiZL1dUYAn0GmlMJ+L /highlight.min.js
+```
+

saltgui/static/highlight/LICENSE

@@ -0,0 +1,29 @@
+BSD 3-Clause License
+
+Copyright (c) 2006, Ivan Sagalaev.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+  list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+  this list of conditions and the following disclaimer in the documentation
+  and/or other materials provided with the distribution.
+
+* Neither the name of the copyright holder nor the names of its
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

saltgui/static/highlight/README.md

@@ -0,0 +1,45 @@
+# Highlight.js CDN Assets
+
+[![install size](https://packagephobia.now.sh/badge?p=highlight.js)](https://packagephobia.now.sh/result?p=highlight.js)
+
+**This package contains only the CDN build assets of highlight.js.**
+
+This may be what you want if you'd like to install the pre-built distributable highlight.js client-side assets via NPM. If you're wanting to use highlight.js mainly on the server-side you likely want the [highlight.js][1] package instead.
+
+To access these files via CDN:<br>
+https://cdn.jsdelivr.net/gh/highlightjs/cdn-release@latest/build/
+
+**If you just want a single .js file with the common languages built-in:
+<https://cdn.jsdelivr.net/gh/highlightjs/cdn-release@latest/build/highlight.min.js>**
+
+---
+
+## Highlight.js
+
+Highlight.js is a syntax highlighter written in JavaScript. It works in
+the browser as well as on the server. It works with pretty much any
+markup, doesn’t depend on any framework, and has automatic language
+detection.
+
+If you'd like to read the full README:<br>
+<https://github.com/highlightjs/highlight.js/blob/main/README.md>
+
+## License
+
+Highlight.js is released under the BSD License. See [LICENSE][7] file
+for details.
+
+## Links
+
+The official site for the library is at <https://highlightjs.org/>.
+
+The Github project may be found at: <https://github.com/highlightjs/highlight.js>
+
+Further in-depth documentation for the API and other topics is at
+<http://highlightjs.readthedocs.io/>.
+
+A list of the Core Team and contributors can be found in the [CONTRIBUTORS.md][8] file.
+
+[1]: https://www.npmjs.com/package/highlight.js
+[7]: https://github.com/highlightjs/highlight.js/blob/main/LICENSE
+[8]: https://github.com/highlightjs/highlight.js/blob/main/CONTRIBUTORS.md