Update CONTRIBUTING.md for the current state of things. (#28283)

.github/CONTRIBUTING.md

@@ -19,7 +19,8 @@ and [submitting pull requests](#pull-requests), but please respect the following
 restrictions:
 
 * Please **do not** use the issue tracker for personal support requests.  Stack
-  Overflow ([`bootstrap-4`](https://stackoverflow.com/questions/tagged/bootstrap-4) tag), [Slack](https://bootstrap-slack.herokuapp.com/) or [IRC](README.md#community) are better places to get help.
+  Overflow ([`bootstrap-4`](https://stackoverflow.com/questions/tagged/bootstrap-4) tag),
+  [Slack](https://bootstrap-slack.herokuapp.com/) or [IRC](README.md#community) are better places to get help.
 
 * Please **do not** derail or troll issues. Keep the discussion on topic and
   respect the opinions of others.
@@ -57,8 +58,7 @@ Good bug reports are extremely helpful, so thanks!
 
 Guidelines for bug reports:
 
-0. **Validate and lint your code** — [validate your HTML](https://html5.validator.nu/)
-   and [lint your HTML](https://github.com/twbs/bootlint) to ensure your
+0. **[validate your HTML](https://html5.validator.nu/)** to ensure your
    problem isn't caused by a simple error in your own code.
 
 1. **Use the GitHub issue search** — check if the issue has already been
@@ -109,10 +109,6 @@ When feasible, we aim to report such upstream bugs to the relevant browser vendo
 | Google, Opera | Chrome, Chromium, Opera v15+ | Blink            | https://bugs.chromium.org/p/chromium/issues/list                                      | Click the "New issue" button.                            |
 | Microsoft     | Edge                         | EdgeHTML         | https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/                 |                                                          |
 
-### Issues bots
-
-[@twbs-lmvtfy](https://github.com/twbs-lmvtfy) is a Bootstrap bot that hangs out in our GitHub issue tracker and automatically checks for HTML validation errors in live examples (e.g. jsFiddles, JS Bins, Bootplys, Plunks, CodePens, etc.) posted in issue comments. If it finds any errors, it will post a follow-up comment on the issue and point out the errors. If this happens with an example you've posted, please fix the errors and post an updated live example. If you opened a bug report, please check whether the bug still occurs with your revised, valid live example. If the bug no longer occurs, it was probably due to your invalid HTML rather than something in Bootstrap and we'd appreciate it if you could close out the GitHub issue.
-
 
 ## Feature requests
 
@@ -140,11 +136,11 @@ project (indentation, accurate comments, etc.) and any other requirements
 **Do not edit `bootstrap.css`, or `bootstrap.js`
 directly!** Those files are automatically generated. You should edit the
 source files in [`/bootstrap/scss/`](https://github.com/twbs/bootstrap/tree/master/scss)
-and/or [`/bootstrap/js/`](https://github.com/twbs/bootstrap/tree/master/js) instead.
+and/or [`/bootstrap/js/src/`](https://github.com/twbs/bootstrap/tree/master/js/src) instead.
 
 Similarly, when contributing to Bootstrap's documentation, you should edit the
 documentation source files in
-[the `/bootstrap/docs/` directory of the `master` branch](https://github.com/twbs/bootstrap/tree/master/docs).
+[the `/bootstrap/site/docs/` directory of the `master` branch](https://github.com/twbs/bootstrap/tree/master/site/docs).
 **Do not edit the `gh-pages` branch.** That branch is generated from the
 documentation source files and is managed separately by the Bootstrap Core Team.
 
@@ -201,7 +197,7 @@ included in the project:
 **IMPORTANT**: By submitting a patch, you agree to allow the project owners to
 license your work under the terms of the [MIT License](LICENSE) (if it
 includes code changes) and under the terms of the
-[Creative Commons Attribution 3.0 Unported License](docs/LICENSE)
+[Creative Commons Attribution 3.0 Unported License](https://creativecommons.org/licenses/by/3.0/)
 (if it includes documentation changes).
 
 
@@ -238,6 +234,6 @@ Run `npm run test` before committing to ensure your changes follow our coding st
 ## License
 
 By contributing your code, you agree to license your contribution under the [MIT License](LICENSE).
-By contributing to the documentation, you agree to license your contribution under the [Creative Commons Attribution 3.0 Unported License](docs/LICENSE).
+By contributing to the documentation, you agree to license your contribution under the [Creative Commons Attribution 3.0 Unported License](https://creativecommons.org/licenses/by/3.0/).
 
 Prior to v3.1.0, Bootstrap's code was released under the Apache License v2.0.