Add missing date stamps to errata

(Except for one that I could not find in commit history at all)

Author: kfranqueiro

errata/21.html

@@ -19,6 +19,7 @@ <h2>Abstract</h2>
     <p>The errata are classified as Substantive or Editorial, and listed in chronological order based on the date of publication to which they are applicable.</p>
     <p>Each entry has the following information:</p>
     <ul>
+      <li>The date it was added to the errata page.</li>
       <li>The section referred to.</li>
       <li>A description of the problem and correction if applicable.</li>
       <li>A rationale for making the change (not required for editorial errata).</li>
@@ -46,20 +47,20 @@ <h3>Substantive Errata</h3>
         <h3>Editorial Errata</h3>
         <ul>
           <li>In the <a href="{{ trUrl }}#sotd">Status of This Document</a> the paragraph beginning "This document has been reviewed by W3C Members..." appears twice. The first instance of this paragraph should be removed.</li>
-          <li>In the <a href="{{ trUrl }}#intro">Introduction</a>, several (but not all) references to "WCAG 2.0" should be "WCAG 2.1".</li>
-          <li>In the <a href="{{ trUrl }}#numbering-in-wcag-2-1">0.5.2 Numbering in WCAG 2.1</a>, the words "critera" and "ccriteria" should be "criteria".</li>
-          <li>In <a href="{{ trUrl }}#reflow">1.4.10 Reflow</a>, the first note had a supernumary "Note" indicator which should be removed.</li>
-          <li>In <a href="{{ trUrl }}#content-on-hover-or-focus">1.4.13 Content on Hover or Focus</a>, the word "dismissable" should be "dismissible".</li>
-          <li>In <a href="{{ trUrl }}#robust">4. Robust</a>, the word "by" is repeated but should be present only once.</li>
-          <li>In <a href="{{ trUrl }}#cc2">5.2.2 Full pages</a>, the third note began with "New" which should be removed.</li>
-          <li>In <a href="{{ trUrl }}#conformance-required">5.3.1 Required Components of a Conformance Claim</a> the editorial note "In WCAG 2.0 this was a dated URI, which may need to be adjusted when this becomes a Rec." should be removed.</li>
-          <li>In the definition for <a href="{{ trUrl }}#dfn-keyboard-interface">keyboard interface</a>, the second (of three) note should be an example of the first note, leaving only two actual notes.</li>
-          <li>In the definition for <a href="{{ trUrl }}#dfn-technologies">technology</a>, the third note should instead be an example.</li>
-          <li>In <a href="{{ trUrl }}#input-purposes">7. Input Purposes for User Interface Components</a>, the word "county" should be "country".</li>
-          <li>In <a href="{{ trUrl }}#orientation">1.3.4 Orientation</a>, the note referencing "binary display orientation" has been clarified to read "content is not necessarily restricted to landscape or portrait display orientation".</li>
-          <li>In <a href="{{ trUrl }}#issue-container-generatedID-43">a note in the definition of accessibility supported</a>, references to "Conformance Criterion" were changed to "Conformance Requirement".</li>
-          <li>In the <a href="{{ trUrl }}#dfn-relative-luminance">definition of relative luminance</a>, the red threshold was updated from 0.03928 to 0.04045.</li>
-          <li>In <a href="{{ trUrl }}#parsing">4.1.1 Parsing</a> one note should be  deleted, and two notes added, including: "This Success Criterion should be considered as always satisfied for any content using HTML or XML."</li>
+          <li>2018-07-11: In the <a href="{{ trUrl }}#intro">Introduction</a>, several (but not all) references to "WCAG 2.0" should be "WCAG 2.1".</li>
+          <li>2018-07-11: In the <a href="{{ trUrl }}#numbering-in-wcag-2-1">0.5.2 Numbering in WCAG 2.1</a>, the words "critera" and "ccriteria" should be "criteria".</li>
+          <li>2018-07-11: In <a href="{{ trUrl }}#reflow">1.4.10 Reflow</a>, the first note had a supernumary "Note" indicator which should be removed.</li>
+          <li>2018-08-06: In <a href="{{ trUrl }}#content-on-hover-or-focus">1.4.13 Content on Hover or Focus</a>, the word "dismissable" should be "dismissible".</li>
+          <li>2018-08-06: In <a href="{{ trUrl }}#robust">4. Robust</a>, the word "by" is repeated but should be present only once.</li>
+          <li>2018-08-06: In <a href="{{ trUrl }}#cc2">5.2.2 Full pages</a>, the third note began with "New" which should be removed.</li>
+          <li>2018-07-11: In <a href="{{ trUrl }}#conformance-required">5.3.1 Required Components of a Conformance Claim</a> the editorial note "In WCAG 2.0 this was a dated URI, which may need to be adjusted when this becomes a Rec." should be removed.</li>
+          <li>2018-07-11: In the definition for <a href="{{ trUrl }}#dfn-keyboard-interface">keyboard interface</a>, the second (of three) note should be an example of the first note, leaving only two actual notes.</li>
+          <li>2018-07-11: In the definition for <a href="{{ trUrl }}#dfn-technologies">technology</a>, the third note should instead be an example.</li>
+          <li>2018-06-08: In <a href="{{ trUrl }}#input-purposes">7. Input Purposes for User Interface Components</a>, the word "county" should be "country".</li>
+          <li>2019-05-09: In <a href="{{ trUrl }}#orientation">1.3.4 Orientation</a>, the note referencing "binary display orientation" has been clarified to read "content is not necessarily restricted to landscape or portrait display orientation".</li>
+          <li>2022-02-02: In <a href="{{ trUrl }}#issue-container-generatedID-43">a note in the definition of accessibility supported</a>, references to "Conformance Criterion" were changed to "Conformance Requirement".</li>
+          <li>2022-02-22: In the <a href="{{ trUrl }}#dfn-relative-luminance">definition of relative luminance</a>, the red threshold was updated from 0.03928 to 0.04045.</li>
+          <li>2023-04-18: In <a href="{{ trUrl }}#parsing">4.1.1 Parsing</a> one note should be  deleted, and two notes added, including: "This Success Criterion should be considered as always satisfied for any content using HTML or XML."</li>
         </ul>
       </section>
     </section>

errata/22.html

@@ -19,6 +19,7 @@ <h2>Abstract</h2>
     <p>The errata are classified as Substantive or Editorial, and listed in chronological order based on the date of publication to which they are applicable.</p>
     <p>Each entry has the following information:</p>
     <ul>
+      <li>The date it was added to the errata page.</li>
       <li>The section referred to.</li>
       <li>A description of the problem and correction if applicable.</li>
       <li>A rationale for making the change (not required for editorial errata).</li>