simplifying notes in visual-presentation

Author: shawna-slh

guidelines/sc/20/visual-presentation.html

@@ -16,6 +16,6 @@ <h4>Visual Presentation</h4>
 
 <p class="note">Content is not required to use these values. The requirement is that a mechanism is available for users to change these presentation aspects. The mechanism can be provided by the browser or other user agent. Content is not required to provide the mechanism.</p>
 
-<p class="note">Some language writing systems use different presentation aspects to improve readability and legibility, such as paragraph start indent. Some do not use all of the presentation aspects in this success criterion. If a presentation aspect is not used in a writing system (for example, it does not use paragraph spacing), content in that writing system can conform without it.</p>
+<p class="note">Writing systems for some languages use different presentation aspects to improve readability and legibility, such as paragraph start indent. If a presentation aspect in this success criterion is not used in a writing system (for example, it does not use paragraph spacing), content in that writing system can conform without it.</p>
 
 </section>