Fix typos "the the"

Author: fred-wang

index.html

@@ -2697,7 +2697,7 @@ <h4>Radicals <code>&lt;msqrt&gt;</code>, <code>&lt;mroot&gt;</code></h4>
               square root applies to all of them.
               <a>&lt;mroot&gt;</a> has exactly two children: it is a
               root of index the second child (the number 3), applied to the
-              the first child (the square root).
+              first child (the square root).
               Also note these elements only change the font-size within the
               <a>&lt;mroot&gt;</a> index, but it is scaled down more than
               within the numerator and denumerator of the fraction.
@@ -5336,7 +5336,7 @@ <h4>The <code>GlyphAssembly</code> table</h4>
               the width is <a>glyph assembly stretch size</a>
               for a given target size <code>T</code> while
               the ascent (respectively descent) is the
-              the maximum ascent (respectively descent) of the glyphs of id
+              maximum ascent (respectively descent) of the glyphs of id
               <code>GlyphPartRecord.glyphID</code> for all the
               <code>GlyphPartRecord</code> in
               <code>GlyphAssembly.partRecords</code>.
@@ -5926,7 +5926,7 @@ <h2>Privacy and Security Considerations</h2>
       </p>
       <p>
         This specification only adds script execution mechanisms in the
-        the MathML event handler attributes described in
+        MathML event handler attributes described in
         <a href="#global-attributes"></a>. UAs may decide to apply the same
         security restrictions as HTML and SVG to prevent execution of scripts
         in these attributes.