Editorial: fix markup, spelling, and punctuation

Author: jmdyck

source

@@ -19697,7 +19697,7 @@ interface <dfn interface>HTMLHeadingElement</dfn> : <span>HTMLElement</span> {
       value.</p>
      </li>
 
-     <li><p>Increment <var>offset</var> by <var>nextOffset</var></p></li>
+     <li><p>Increment <var>offset</var> by <var>nextOffset</var>.</p></li>
 
      <li><p>If <var>inclusiveAncestor</var> is an <span data-x="HTML elements">HTML element</span>
      and has a <code data-x="attr-headingreset">headingreset</code> attribute, then return
@@ -109000,7 +109000,7 @@ new PaymentRequest(&hellip;); // Allowed to use
   </div>
 
   <p>To <dfn>parse a speculation rule set string</dfn> given a <span>string</span> <var>input</var>,
-  a <code>Document</code> <var>document</var>, and a <span>URL</span> <var>baseURL:</var></p>
+  a <code>Document</code> <var>document</var>, and a <span>URL</span> <var>baseURL</var>:</p>
 
   <ol>
    <li><p>Let <var>parsed</var> be the result of <span data-x="parse a JSON string to an Infra
@@ -109610,7 +109610,7 @@ new PaymentRequest(&hellip;); // Allowed to use
       <ol>
        <li><p>Let <var>pattern</var> be the result of <span data-x="build a URL pattern from an
        Infra value">building a URL pattern from an Infra value</span> given <var>rawPattern</var>
-       and <var>baseURL</var>. If this step throws and exception, catch the exception and set
+       and <var>baseURL</var>. If this step throws an exception, catch the exception and set
        <var>pattern</var> to null.</p></li>
 
        <li>
@@ -109713,7 +109713,7 @@ new PaymentRequest(&hellip;); // Allowed to use
    <li><p><dfn data-x="sl-candidate-referrer-policy">referrer policy</dfn>, a <span>referrer
    policy</span></p></li>
 
-   <li><P><dfn data-x="sl-candidate-tags">tags</dfn>, an <span data-x="set">ordered set</span> of
+   <li><p><dfn data-x="sl-candidate-tags">tags</dfn>, an <span data-x="set">ordered set</span> of
    <span data-x="speculation rule tag">speculation rule tags</span></p></li>
   </ul>
 
@@ -109940,7 +109940,7 @@ new PaymentRequest(&hellip;); // Allowed to use
        </li>
 
        <li>
-        <p>If <Var>rule</var>'s <span data-x="sr-predicate">predicate</span> is not null:</p>
+        <p>If <var>rule</var>'s <span data-x="sr-predicate">predicate</span> is not null:</p>
 
         <ol>
          <li><p>Let <var>links</var> be the result of <span data-x="find matching links">finding
@@ -110284,7 +110284,7 @@ new PaymentRequest(&hellip;); // Allowed to use
       <ol>
        <li><p>If performing a <span data-x="match a selector against an element">match</span> given
        <var>selector</var> and <var>el</var> with the <span>scoping root</span> set to
-       <var>el</var>'s <span>root</span> returns sucess, then return true.</p></li>
+       <var>el</var>'s <span>root</span> returns success, then return true.</p></li>
       </ol>
      </li>