minor punctuation fixes

content/new-in-22.md

@@ -204,7 +204,7 @@ Provide ways to help users navigate, find content, and determine where they are.
 </ul>
 <p class="note"><em>Note:</em> What is perceived as the user interface component or sub-component (to determine enclosure or size) depends on its visual presentation. The visual presentation includes the component's visible content, border, and component-specific background. It does not include shadow and glow effects outside the component's content, background, or border.</p>
 <p class="note"><em>Note:</em> Examples of sub-components that may receive a focus indicator are menu items in an opened drop-down menu, or focusable cells in a grid.</p>
-<p class="note"><em>Note:</em> Contrast calculations can be based on colors defined within the technology (such as HTML, CSS and SVG). Pixels modified by user agent resolution enhancements and anti-aliasing can be ignored.</p>
+<p class="note"><em>Note:</em> Contrast calculations can be based on colors defined within the technology (such as HTML, CSS, and SVG). Pixels modified by user agent resolution enhancements and anti-aliasing can be ignored.</p>
 </blockquote>
 <p><a href="https://www.w3.org/WAI/WCAG22/Understanding/focus-appearance.html">Understanding Focus Appearance</a></p>
 
@@ -235,7 +235,7 @@ Make it easier for users to operate functionality through various inputs beyond
 <p class="sclabel">WCAG success criteria:</p>
 <blockquote class="sc">
 <p>All functionality that uses a <a href="https://www.w3.org/TR/WCAG22/#dfn-dragging-movements">dragging movement</a> for operation can be achieved by a <a href="https://www.w3.org/TR/WCAG22/#dfn-single-pointer">single pointer</a> without dragging, unless dragging is <a href="https://www.w3.org/TR/WCAG22/#dfn-essential">essential</a> or the functionality is determined by the user agent and not modified by the author.</p>
-<p class="note"><em>Note:</em> This requirement applies to web content that interprets pointer actions (i.e. this does not apply to actions that are required to operate the user agent or assistive technology).</p>
+<p class="note"><em>Note:</em> This requirement applies to web content that interprets pointer actions (i.e., this does not apply to actions that are required to operate the user agent or assistive technology).</p>
 </blockquote>
 <p><a href="https://www.w3.org/WAI/WCAG22/Understanding/dragging-movements">Understanding Dragging Movements</a></p>