Update composed selection range definition

Author: dizhang168

dom.bs

@@ -8168,15 +8168,14 @@ interface Range : AbstractRange {
 <p>Objects implementing the {{Range}} interface are known as
 <dfn export id=concept-live-range>live ranges</dfn>.
 
-<p class=note>Algorithms that modify a <a>tree</a> (in particular the <a for=/>insert</a>,
-<a for=/>remove</a>, <a>replace data</a>, and <a lt="split a Text node">split</a> algorithms) modify
-<a>live ranges</a> associated with that <a>tree</a>.
-
 <p>A <dfn export id=concept-composed-selection-range>composed selection range</dfn> is a
-<a>range</a> that is affected by mutations to the <a>node tree</a> and has an associated
-<a>live range</a> called
+<a>range</a> with an associated <a>live range</a> called
 <dfn export id=concept-legacy-selection-range for="composed selection range">legacy selection range</dfn>.
 
+<p class=note>Algorithms that modify a <a>tree</a> (in particular the <a for=/>insert</a>,
+<a for=/>remove</a>, <a>replace data</a>, and <a lt="split a Text node">split</a> algorithms) modify
+<a>live ranges</a> and <a>composed selection range</a> associated with that <a>tree</a>.
+
 <p class=note>The <a for="composed selection range">legacy selection range</a> is used to maintain
 backward compatibility with the {{Selection/getRangeAt()}} API.