Update the Changes section

Also mark non-normative sections as such.

Author: zcorpan

geometry/Overview.bs

@@ -57,6 +57,8 @@ a.selected-text-file-an-issue {
 
 <h2 id=intro>Introduction</h2>
 
+<p><em>This section is non-normative.</em>
+
 <p>This specification describes several geometry interfaces for the representation of points,
 rectangles, quadrilaterals and transformation matrices with the dimension of 3x2 and 4x4.
 
@@ -2049,6 +2051,8 @@ specification could potentially introduce security or privacy issues.
 
 <h2 id="historical">Historical</h2>
 
+<p><em>This section is non-normative.</em>
+
 <p>The interfaces in this specification are intended to replace earlier similar interfaces found in
 various specifications as well as proprietary interfaces found in some user agents. This section
 attempts to enumerate these interfaces.
@@ -2081,13 +2085,25 @@ this specification will not support <code>MSCSSMatrix</code>.
 
 <h2 class="no-num" id="changes">Changes since last publication</h2>
 
+<p><em>This section is non-normative.</em>
+
 <p>The following changes were made since the <a
 href="https://www.w3.org/TR/2014/WD-geometry-1-20140918/">18 September 2014 Working Draft</a>.
 
 <ul>
+ <li><p>Changed the interfaces to generally use specific static operations for construction instead
+ of using overloaded constructors, and made the interfaces more consistent. However, {{DOMMatrix}}
+ still uses an overloaded constructor for compatibility with {{WebKitCSSMatrix}}.
+
+ <li><p>Introduced the {{DOMMatrixInit}} dictionary.
+
+ <li><p>Removed the <code>DOMRectList</code> interface.
+
+ <li><p>Added JSON serializers for the interfaces.
+
  <li>
   <p>Changed {{DOMMatrixReadOnly}} and {{DOMMatrix}} to be compatible with
-  <code>WebKitCSSMatrix</code>:
+  {{WebKitCSSMatrix}}:
 
   <ul>
    <li><p>Changed {{DOMMatrixReadOnly/rotate()}} and {{DOMMatrix/rotateSelf()}} arguments from
@@ -2100,19 +2116,29 @@ href="https://www.w3.org/TR/2014/WD-geometry-1-20140918/">18 September 2014 Work
    <li><p>Made all arguments optional for {{DOMMatrix}}/{{DOMMatrixReadOnly}} methods, except for
    {{DOMMatrix/setMatrixValue()}}.
 
-   <li><p>Changed <code>fromString()</code> static method to overloaded constructor.
-
    <li><p>Added no-argument constructor.
 
-   <li><p>Defined <code>window.WebKitCSSMatrix</code> to alias {{DOMMatrix}}.
+   <li><p>Defined {{WebKitCSSMatrix}} to be a legacy window alias for {{DOMMatrix}}.
   </ul>
 
  <li><p>Exposed {{DOMPointReadOnly}}, {{DOMPoint}}, {{DOMRectReadOnly}}, {{DOMRect}}, {{DOMQuad}},
- {{DOMMatrixReadOnly}} and {{DOMMatrix}} to {{Window}} and {{Worker}}. Defined cloning of the
- interfaces.
+ {{DOMMatrixReadOnly}} and {{DOMMatrix}} to {{Window}} and {{Worker}}. In workers, {{DOMMatrix}} and
+ {{DOMMatrixReadOnly}} do not support parsing or stringifying with CSS syntax.
+
+ <li><p>Defined structured serialization of the interfaces.
 
  <li><p>The live <code>bounds</code> attribute on {{DOMQuad}} was replaced with a non-live
  {{DOMQuad/getBounds()}} method. The "associated bounding rectangle" concept was also removed.
+
+ <li><p>Changed the string parser for {{DOMMatrix}} and {{DOMMatrixReadOnly}} to use CSS rules
+ instead of SVG rules.
+
+ <li><p>The stringifier for {{DOMMatrix}} and {{DOMMatrixReadOnly}} now throws if there are
+ non-finite values, and otherwise uses the [=ToString=] algorithm. [[ECMA-262]]
+
+ <li><p>Made comparisons treat ''0'' and ''-0'' as equal throughout.
+
+ <li><p>Added [[#priv-sec]] and [[#historical]] sections.
 </ul>
 
 <p>The following changes were made since the <a
@@ -2126,7 +2152,7 @@ Draft</a>.
 
  <li><p>{{DOMMatrixReadOnly}} got a constructor taking a sequence of numbers as argument.
 
- <li><p>DOMRectList turned to an ArrayClass. The interfaces must just be used for legacy interfaces.
+ <li><p>DOMRectList turned to an ArrayClass. The interfaces can just be used for legacy interfaces.
 
  <li><p>Put DOMRectList on at-Risk awaiting browser feedback.