Fix a few 404 and one redirected link. (#24432)

README.md

@@ -109,7 +109,7 @@ Documentation search is powered by [Algolia's DocSearch](https://community.algol
 2. Run `npm install` to install Node.js dependencies.
 3. Run `npm run test` (or a specific NPM script) to rebuild distributed CSS and JavaScript files, as well as our docs assets.
 4. From the root `/bootstrap` directory, run `npm run docs-serve` in the command line.
-5. Open <http://localhost:9001> in your browser, and voilà.
+5. Open `http://localhost:9001` in your browser, and voilà.
 
 Learn more about using Jekyll by reading its [documentation](https://jekyllrb.com/docs/home/).
 

docs/4.0/components/navbar.md

@@ -52,10 +52,10 @@ Here's an example of all the sub-components included in a responsive light-theme
           Dropdown
         </a>
         <div class="dropdown-menu" aria-labelledby="navbarDropdown">
-          <a class="dropdown-item" href="/action">Action</a>
-          <a class="dropdown-item" href="/another_action">Another action</a>
+          <a class="dropdown-item" href="#">Action</a>
+          <a class="dropdown-item" href="#">Another action</a>
           <div class="dropdown-divider"></div>
-          <a class="dropdown-item" href="http://www.example.com/something_else_here">Something else here</a>
+          <a class="dropdown-item" href="#">Something else here</a>
         </div>
       </li>
       <li class="nav-item">
@@ -70,7 +70,7 @@ Here's an example of all the sub-components included in a responsive light-theme
 </nav>
 {% endexample %}
 
-This example uses [color]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/color/) (`bg-light`) and [spacing]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/spacing/) (`my-2`, `my-lg-0`, `mr-sm-0`, `my-sm-0`) utility classes.
+This example uses [color]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/colors/) (`bg-light`) and [spacing]({{ site.baseurl }}/docs/{{ site.docs_version }}/utilities/spacing/) (`my-2`, `my-lg-0`, `mr-sm-0`, `my-sm-0`) utility classes.
 
 ### Brand
 

docs/4.0/getting-started/accessibility.md

@@ -49,5 +49,5 @@ For visually hidden interactive controls, such as traditional "skip" links, `.sr
 - [The A11Y Project](http://a11yproject.com/)
 - [MDN accessibility documentation](https://developer.mozilla.org/en-US/docs/Web/Accessibility)
 - [Tenon.io Accessibility Checker](https://tenon.io/)
-- [Colour Contrast Analyser (CCA)](https://www.paciellogroup.com/resources/contrastanalyser/)
+- [Colour Contrast Analyser (CCA)](https://developer.paciellogroup.com/resources/contrastanalyser/)
 - ["HTML Codesniffer" bookmarklet for identifying accessibility issues](https://github.com/squizlabs/HTML_CodeSniffer)

docs/4.0/getting-started/build-tools.md

@@ -46,7 +46,7 @@ Running our documentation locally requires the use of Jekyll, a decently flexibl
 
 1. Run through the [tooling setup](#tooling-setup) above to install Jekyll (the site builder) and other Ruby dependencies with `bundle install`.
 2. From the root `/bootstrap` directory, run `npm run docs-serve` in the command line.
-3. Open <http://localhost:9001> in your browser, and voilà.
+3. Open `http://localhost:9001` in your browser, and voilà.
 
 Learn more about using Jekyll by reading its [documentation](https://jekyllrb.com/docs/home/).