editorial corrections following meeting

Author: davidcarlisle

src/presentation-markup.html

@@ -3657,11 +3657,11 @@ <h5 id="presm_genlayout_desc">Description</h5>
  on other elements (see <a href="#presm_linebreaking"></a>).
  </p>
 
- <p>In MathML 4 <code class="element">mrow</code> and
+ <p>In MathML 4, <code class="element">mrow</code> and
  <code class="element">a</code> have identical behavior, however
- <code class="element">a</code>has been added for compatibility with MathML
- Core. MathML Core only supprts the <code class="attname">href</code>
- attribute on the <code class="element">a</code> element.</p>
+ <code class="element">a</code> has been added for compatibility with MathML
+ Core. MathML Core does not support the <code class="attname">href</code>
+ attribute on elements other than <code class="element">a</code>.</p>
 
  </section>