Harmonise spelling for "breakpoint"

closes #4164

guidelines/sc/22/consistent-help.html

@@ -15,7 +15,7 @@ <h4>Consistent Help</h4>
     </ul>
 
   <p class="note">Help mechanisms may be provided directly on the page, or may be provided via a direct link to a different page containing the information.</p>
-  <p class="note">For this success criterion, "the same order relative to other page content" can be thought of as how the content is ordered when the page is serialized. The visual position of a help mechanism is likely to be consistent across pages for the same page variation (e.g., CSS break-point). The user can initiate a change, such as changing the page's zoom or orientation, which may trigger a different page variation. This criterion is concerned with relative order across pages displayed in the same page variation (e.g., same zoom level and orientation).</p>
+  <p class="note">For this success criterion, "the same order relative to other page content" can be thought of as how the content is ordered when the page is serialized. The visual position of a help mechanism is likely to be consistent across pages for the same page variation (e.g., CSS breakpoint). The user can initiate a change, such as changing the page's zoom or orientation, which may trigger a different page variation. This criterion is concerned with relative order across pages displayed in the same page variation (e.g., same zoom level and orientation).</p>
 
  </section>
 

understanding/21/reflow.html

@@ -26,7 +26,7 @@ <h2>Intent of this Success Criterion</h2>
       <section>
       <h3>How reflow works</h3>
       <p>User agents for technologies such as HTML/CSS, PDF, and ePub have methods for reflowing content to fit the width of the window (viewport). When appropriately authored, page content can reflow (wrap) to stay within the window's boundaries (viewport) when users zoom in to enlarge the size of content. Spatial relationships of content may change when users zoom, but all information and functionality should continue to be available.</p>
-      <p>Supporting the reflow of content is also known as 'Responsive Web Design'. It is enabled by CSS media queries which reformat the web content for different viewport widths (at particular break points) in order to provide optimised layouts for mobile devices such as tablets or smartphones. Importantly, these breakpoints are not only triggered by narrower viewports, but also when users employ the browser zoom function to zoom into the page.</p>
+      <p>Supporting the reflow of content is also known as 'Responsive Web Design'. It is enabled by CSS media queries which reformat the web content for different viewport widths (at particular breakpoints) in order to provide optimised layouts for mobile devices such as tablets or smartphones. Importantly, these breakpoints are not only triggered by narrower viewports, but also when users employ the browser zoom function to zoom into the page.</p>
       <p>In a desktop browser at 100% (default) scale, typical web pages that support reflow display content in two, three or more columns. Zooming in will at some point trigger a change of layout, so content will now be displayed in fewer columns. At a higher magnification scale of 200% or more, content will usually be rendered in a single column. Parts of content that were in the marginal columns, like a navigation menu or supplementary content, will now typically appear on top of or below the main content.</p>
       </section>
       <section>
@@ -51,7 +51,7 @@ <h3>Content exceptions for reflow</h3>
       </section>
       <section>
       <h3>Responsive web design and other ways to meet this Success Criterion</h3>
-      <p>Using the responsive web design approach is the most effective method of achieving the goal of allowing people to zoom in to 400%. Each variation (CSS break point) of the page at the same URL should conform (compare <a href="https://www.w3.org/TR/WCAG21/#h-note-27">Conformance for WCAG 2.1</a>).</p>
+      <p>Using the responsive web design approach is the most effective method of achieving the goal of allowing people to zoom in to 400%. Each variation (CSS breakpoint) of the page at the same URL should conform (compare <a href="https://www.w3.org/TR/WCAG21/#h-note-27">Conformance for WCAG 2.1</a>).</p>
       <p>For organisations which are using legacy systems or are not able to update their layout methods for some reason, an alternative conforming version could be a mobile site which has a fixed 320px wide layout. The user should be able to find that version from the default website.</p>
       </section>
       <section>