[css-writing-modes-3] Update implementation report

Author: frivoal

css-writing-modes-3/implementation-report-2019-08.html

@@ -41,7 +41,7 @@
 
 <header>
 	<h1>Implementation Report for the CSS Writing Modes Level 3</h1>
-	<time datetime="2019-09-19">19 September 2019</time>
+	<time datetime="2019-10-01">01 October 2019</time>
 </header>
 
 <nav>
@@ -84,9 +84,39 @@ <h3 id=summary><a href="#summary" class=self-link></a>1.1. Summary</h3>
 9 of the tests that do pass in two implementations
 do so by <a href="#careful">taking into account non browser implementations</a>.
 
-<!--
-<p><strong>The Candidate Recommendation exit criteria are therefore not fulfilled.</strong>
--->
+The CSS-WG has examined the <a href="#pb">remaining failing tests</a>,
+and based on the following considerations,
+believes that
+<strong>the Candidate Recommendation exit criteria are fulfilled</strong>:
+
+<ul>
+	<li>
+		The success criteria established in the working group charter speficy that
+		<q>In order to advance to Proposed Recommendation,
+			each module is expected to have at least two independent implementations
+			of each of feature defined in the specification</q>.
+		With multiple browser engines (as well as non browsers) implementing the specification,
+		this criterion is fulfilled,
+		even though there remains a few tests for certain specificities of some features
+		that do not yet have two passing implementations.
+
+	<li>
+		Quite a few of the failing tests have work-in-progress implementations.
+
+	<li>
+		CSS Writing Modes Level 3 is a particularly complex specification,
+		affecting all aspects of layout.
+		For a project of that complexity,
+		no matter how much time we spend on it,
+		there will always be a few more bugs to fix,
+		and a few more nuances to get right.
+		We should not let the fact that we're being thorough with testing
+		impede the progress of specification,
+		and we believe that it is appropriate to signal to the broader community
+		the degree of stability of this specification
+		by publishing it as a Proposed Recommendation,
+		then as a W3C Recommendation.
+</ul>
 
 <p>9 of 27 optional tests pass in two or more browser implementations;
 18 do not.
@@ -302,7 +332,7 @@ <h2 id=method><a href="#method" class=self-link></a>2. Methodology</h2>
 or to the archived public discussion mailing list for CSS test suites, <a href="mailto:public-css-testsuite@w3.org">public-css-testsuite@w3.org</a>.
 
 <p>A <a href="https://test.csswg.org/harness/results/css-writing-modes-3_dev/">continuously updated version of the test suite</a> is available.
-This report was prepared using the tests and their results as of 16 September 2019.
+This report was prepared using the tests as of 16 September 2019.
 
 <p class=note>Note: Many of the tests in this test suite are somewhat old,
 and interact poorly with the automation mechanism of the web-platform-test project.