Editorial: remove double-negative in CORS-preflight fetch

Fixes #279.

PR: #288

Overview.html

@@ -7,7 +7,7 @@
 
 <p><a class="logo" href="https://whatwg.org/"><img alt="WHATWG" height="100" src="https://resources.whatwg.org/logo-fetch.svg" width="100"></a>
 <h1 id="cors">Fetch</h1>
-<h2 class="no-num no-toc" id="living-standard-—-last-updated-18-april-2016">Living Standard — Last Updated 18 April 2016</h2>
+<h2 class="no-num no-toc" id="living-standard-—-last-updated-23-april-2016">Living Standard — Last Updated 23 April 2016</h2>
 
 <dl>
  <dt>Participate:
@@ -3476,9 +3476,9 @@ <h3 id="cors-preflight-fetch"><span class="secno">5.7 </span>CORS-preflight fetc
      <dd><var>max-age</var>
 
      <dt><a href="#concept-cache-credentials" title="concept-cache-credentials">credentials</a>
-     <dd>False if <var>request</var>'s
-     <a href="#concept-request-credentials-mode" title="concept-request-credentials-mode">credentials mode</a> is not
-     "<code title="">include</code>", and true otherwise
+     <dd>True if <var>request</var>'s
+     <a href="#concept-request-credentials-mode" title="concept-request-credentials-mode">credentials mode</a> is
+     "<code title="">include</code>", and false otherwise
 
      <dt><a href="#concept-cache-method" title="concept-cache-method">method</a></dt>
      <dd><var>method</var>
@@ -3508,9 +3508,9 @@ <h3 id="cors-preflight-fetch"><span class="secno">5.7 </span>CORS-preflight fetc
      <dd><var>max-age</var>
 
      <dt><a href="#concept-cache-credentials" title="concept-cache-credentials">credentials</a>
-     <dd>False if <var>request</var>'s
-     <a href="#concept-request-credentials-mode" title="concept-request-credentials-mode">credentials mode</a> is not
-     "<code title="">include</code>", and true otherwise
+     <dd>True if <var>request</var>'s
+     <a href="#concept-request-credentials-mode" title="concept-request-credentials-mode">credentials mode</a> is
+     "<code title="">include</code>", and false otherwise
 
      <dt><a href="#concept-cache-header-name" title="concept-cache-header-name">header name</a></dt>
      <dd><var>headerName</var>
@@ -5326,6 +5326,7 @@ <h2 class="no-num" id="acknowledgments">Acknowledgments</h2>
 Jake Archibald<!-- technically B.J. Archibald -->,
 James Graham,
 Janusz Majnert,
+Jeff Carpenter,
 Jeff Hodges,
 Jeffrey Yasskin,
 Jesse M. Heines,

Overview.src.html

@@ -3406,9 +3406,9 @@ <h3>CORS-preflight fetch</h3>
      <dd><var>max-age</var>
 
      <dt><span title=concept-cache-credentials>credentials</span>
-     <dd>False if <var>request</var>'s
-     <span title=concept-request-credentials-mode>credentials mode</span> is not
-     "<code title>include</code>", and true otherwise
+     <dd>True if <var>request</var>'s
+     <span title=concept-request-credentials-mode>credentials mode</span> is
+     "<code title>include</code>", and false otherwise
 
      <dt><span title=concept-cache-method>method</span></dt>
      <dd><var>method</var>
@@ -3438,9 +3438,9 @@ <h3>CORS-preflight fetch</h3>
      <dd><var>max-age</var>
 
      <dt><span title=concept-cache-credentials>credentials</span>
-     <dd>False if <var>request</var>'s
-     <span title=concept-request-credentials-mode>credentials mode</span> is not
-     "<code title>include</code>", and true otherwise
+     <dd>True if <var>request</var>'s
+     <span title=concept-request-credentials-mode>credentials mode</span> is
+     "<code title>include</code>", and false otherwise
 
      <dt><span title=concept-cache-header-name>header name</span></dt>
      <dd><var>headerName</var>
@@ -5164,6 +5164,7 @@ <h2 class=no-num>Acknowledgments</h2>
 Jake Archibald<!-- technically B.J. Archibald -->,
 James Graham,
 Janusz Majnert,
+Jeff Carpenter,
 Jeff Hodges,
 Jeffrey Yasskin,
 Jesse M. Heines,