Add range checks to shift_jis EUDC handling and ack last commit

https://www.w3.org/Bugs/Public/show_bug.cgi?id=25649

Overview.html

@@ -7,7 +7,7 @@
 
 <p><a class="logo" href="//www.whatwg.org/"><img alt="WHATWG" height="100" src="//resources.whatwg.org/logo-encoding.svg" width="100"></a></p>
 <h1>Encoding</h1>
-<h2 class="no-num no-toc" id="living-standard-—-last-updated-28-april-2014">Living Standard — Last Updated 28 April 2014</h2>
+<h2 class="no-num no-toc" id="living-standard-—-last-updated-12-may-2014">Living Standard — Last Updated 12 May 2014</h2>
 
 <dl>
  <dt>This Version:
@@ -36,7 +36,7 @@ <h2 class="no-num no-toc" id="living-standard-—-last-updated-28-april-2014">Li
 <p class="copyright"><a href="http://creativecommons.org/publicdomain/zero/1.0/" rel="license">CC0 1.0 Universal</a>.
 To the extent possible under law, the editor has waived all copyright and
 related or neighboring rights to this work. In addition, as of
-28 April 2014, the editor has made this specification available
+12 May 2014, the editor has made this specification available
 under the
 <a href="http://www.openwebfoundation.org/legal/the-owf-1-0-agreements/owfa-1-0" rel="license">Open Web Foundation Agreement Version 1.0</a>,
 which is available at
@@ -2353,11 +2353,6 @@ <h4 id="shift_jis-decoder"><span class="secno">12.3.1 </span><dfn>shift_jis deco
    <li><p>Let <var>offset</var> be 0x40, if <var title="">byte</var> is
    less than 0x7F, and 0x41 otherwise.
 
-   <li><p>If <var>lead</var> is in the range 0xF0 to 0xF9, return
-   a code point whose value is
-   0xE000 + (<var>lead</var> − 0xF0) × 188 + <var title="">byte</var> − <var>offset</var>.
-   <!-- EUDC / PUA -->
-
    <li><p>Let <var>lead offset</var> be 0x81, if <var>lead</var>
    is less than 0xA0, and 0xC1 otherwise.
 
@@ -2369,6 +2364,14 @@ <h4 id="shift_jis-decoder"><span class="secno">12.3.1 </span><dfn>shift_jis deco
    <var title="">pointer</var> is null, and the <a href="#index-code-point">index code point</a>
    for <var title="">pointer</var> in <a href="#index-jis0208">index jis0208</a> otherwise.
 
+   <li>
+    <p>If <var title="">code point</var> is null and <var>pointer</var> is in the range
+    8836 to 10528, return a code point whose value is
+    0xE000 + <var>pointer</var> − 8836.
+
+    <p class="note">This is interoperable legacy from Windows known as EUDC.
+    <!-- PUA -->
+
    <li><p>If <var title="">pointer</var> is null,
    <a href="#concept-stream-prepend" title="concept-stream-prepend">prepend</a> <var title="">byte</var> to
    <var>stream</var>.
@@ -2834,6 +2837,7 @@ <h2 class="no-num" id="acknowledgments">Acknowledgments</h2>
 <p>With that, many thanks to
 
 Alan Chaney,
+Alexander Shtuchkin,
 Allen Wirfs-Brock,
 Ben Noordhuis,
 Boris Zbarsky,
@@ -2852,6 +2856,7 @@ <h2 class="no-num" id="acknowledgments">Acknowledgments</h2>
 John Tamplin,
 Joshua Bell,
 신정식 (Jungshik Shin),
+강 성훈 (Kang Seonghoon),
 川幡太一 (Kawabata Taichi),
 Ken Lunde,
 Kenneth Russell,

Overview.src.html

@@ -2270,11 +2270,6 @@ <h4><dfn>shift_jis decoder</dfn></h4>
    <li><p>Let <var>offset</var> be 0x40, if <var title>byte</var> is
    less than 0x7F, and 0x41 otherwise.
 
-   <li><p>If <var>lead</var> is in the range 0xF0 to 0xF9, return
-   a code point whose value is
-   0xE000 + (<var>lead</var> &minus; 0xF0) &times; 188 + <var title>byte</var> &minus; <var>offset</var>.
-   <!-- EUDC / PUA -->
-
    <li><p>Let <var>lead offset</var> be 0x81, if <var>lead</var>
    is less than 0xA0, and 0xC1 otherwise.
 
@@ -2286,6 +2281,14 @@ <h4><dfn>shift_jis decoder</dfn></h4>
    <var title>pointer</var> is null, and the <span>index code point</span>
    for <var title>pointer</var> in <span>index jis0208</span> otherwise.
 
+   <li>
+    <p>If <var title>code point</var> is null and <var>pointer</var> is in the range
+    8836 to 10528, return a code point whose value is
+    0xE000 + <var>pointer</var> &minus; 8836.
+
+    <p class=note>This is interoperable legacy from Windows known as EUDC.
+    <!-- PUA -->
+
    <li><p>If <var title>pointer</var> is null,
    <span title=concept-stream-prepend>prepend</span> <var title>byte</var> to
    <var>stream</var>.
@@ -2727,6 +2730,7 @@ <h2 class=no-num>Acknowledgments</h2>
 <p>With that, many thanks to
 
 Alan Chaney,
+Alexander Shtuchkin,
 Allen Wirfs-Brock,
 Ben Noordhuis,
 Boris Zbarsky,
@@ -2745,6 +2749,7 @@ <h2 class=no-num>Acknowledgments</h2>
 John Tamplin,
 Joshua Bell,
 신정식 (Jungshik Shin),
+강 성훈 (Kang Seonghoon),
 川幡太一 (Kawabata Taichi),
 Ken Lunde,
 Kenneth Russell,