Update menclose help and explain better how tests work in MathML core (…

…#23495)

No consensus have been reached on the future on menclose so far but this
element has been the source of confusion so the current draft text has
been removed from MathML Core and put in a separate pull request:

w3c/mathml-core#24

This PR updates the WPT tests accordingly:

* Actual tests for menclose are renamed "tentative" and refer to the
  pull request above, so that it becomes clear they are not definitive yet
  and browsers are free to ignore them.

* Tests for mrow-like are now referring to MathML3
  https://www.w3.org/TR/MathML3/chapter3.html#presm.menclose
  They are still valid because unknown elements are treated as mrow-like
  in MathML Core.

* Tests for removed legacy features are obviously still valid too.
  Again, the documentation is updated to refer to MathML3
  https://www.w3.org/TR/MathML3/chapter3.html#presm.menclose

mathml/presentation-markup/menclose/legacy-menclose-radical-notation.html

@@ -4,7 +4,7 @@
     <meta charset="utf-8"/>
     <title>Legacy menclose radical notation</title>
     <link rel="help" href="https://www.w3.org/TR/MathML3/chapter3.html#presm.menclose">
-    <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#enclose-expression-inside-notation-menclose">
+    <link rel="help" href="https://www.w3.org/TR/MathML3/chapter3.html#presm.menclose">
     <meta name="assert" content="Verify that the legacy menclose radical notation is ignored.">
     <link rel="match" href="legacy-menclose-radical-notation-ref.html">
     <link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />

mathml/presentation-markup/mrow/inferred-mrow-baseline.html

@@ -9,7 +9,7 @@
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#error-message-merror">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#making-sub-expressions-invisible-mphantom">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#the-top-level-math-element">
-<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#enclose-expression-inside-notation-menclose">
+<link rel="help" href="https://www.w3.org/TR/MathML3/chapter3.html#presm.menclose">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#adjust-space-around-content-mpadded">
 <meta name="assert" content="Baseline for mrow-like elements is correct.">
 <script src="/mathml/support/feature-detection.js"></script>
@@ -41,6 +41,7 @@
     <math><merror><mspace id="aboveError" width="10px" height="30px" style="background: purple"></mspace><mspace id="belowError" width="10px" depth="30px" style="background: blue"></mspace></merror></math>
     <math><mphantom><mspace style="visibility: visible;" id="abovePhantom" width="10px" height="30px" style="background: purple"></mspace><mspace style="visibility: visible;" id="belowPhantom" width="10px" depth="30px" style="background: blue"></mspace></mphantom></math>
     <math><mspace id="aboveMath" width="10px" height="30px" style="background: purple"></mspace><mspace id="belowMath" width="10px" depth="30px" style="background: blue"></mspace></math>
+    <!-- menclose is treated as <unknown> in MathML Core -->
     <math><menclose notation="box"><mspace id="aboveMenclose" width="10px" height="30px" style="background: purple"
 ></mspace><mspace id="belowMenclose" width="10px" depth="30px" style="background: blue"></mspace></menclose></math>
     <math><mpadded lspace="10px"><mspace id="aboveMpadded" width="10px" height="30px" style="background: purple"

mathml/presentation-markup/mrow/inferred-mrow-stretchy.html

@@ -9,7 +9,7 @@
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#error-message-merror">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#making-sub-expressions-invisible-mphantom">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#the-top-level-math-element">
-<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#enclose-expression-inside-notation-menclose">
+<link rel="help" href="https://www.w3.org/TR/MathML3/chapter3.html#presm.menclose">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#adjust-space-around-content-mpadded">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
 <meta name="assert" content="Operators can stretch inside mrow-like elements.">
@@ -51,6 +51,7 @@
     <math><merror><mo id="moError">&#x21A8;</mo><mspace width="1px" height="100px" style="background: magenta"></mspace></merror></math>
     <math><mphantom><mo style="visibilty: visible;" id="moPhantom">&#x21A8;</mo><mspace width="1px" height="100px" style="background: magenta"></mspace></mphantom></math>
     <math><mo id="moMath">&#x21A8;</mo><mspace width="1px" height="100px" style="background: magenta"></mspace></math>
+    <!-- menclose is treated as <unknown> in MathML Core -->
     <math><menclose notation="box"><mo id="moMenclose">&#x21A8;</mo><mspace width="1px" height="100px" style="background: magenta"></mspace></menclose></math>
     <math><mpadded lspace="10px"><mo id="moMpadded">&#x21A8;</mo><mspace width="1px" height="100px" style="background: magenta"></mspace></mpadded></math>
     <math><unknown><mo id="moUnknown">&#x21A8;</mo><mspace width="1px" height="100px" style="background: magenta"></mspace></unknown></math>

mathml/presentation-markup/mrow/legacy-mstyle-attributes.html

@@ -9,7 +9,7 @@
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#fractions-mfrac">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#string-literal-ms">
-<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#enclose-expression-inside-notation-menclose">
+<link rel="help" href="https://www.w3.org/TR/MathML3/chapter3.html#presm.menclose">
 <meta name="assert" content="Legacy mstyle attributes are ignored">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
@@ -135,6 +135,7 @@
       </mstyle>
     </math>
   </p>
+  <!-- notation attribute is from MathML3's menclose element -->
   <p class="TestContainer" id="menclose">
     <math>
       <mstyle notation="box">

mathml/presentation-markup/mrow/spacing.html

@@ -9,7 +9,7 @@
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#error-message-merror">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#making-sub-expressions-invisible-mphantom">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#the-top-level-math-element">
-<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#enclose-expression-inside-notation-menclose">
+<link rel="help" href="https://www.w3.org/TR/MathML3/chapter3.html#presm.menclose">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#adjust-space-around-content-mpadded">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
 <meta name="assert" content="Spacing is added around operators inside mrow-like elements.">
@@ -43,6 +43,7 @@
     <math><merror id="Error"><mn>1</mn><mo lspace="50px"></mo><mn>2</mn></merror></math>
     <math><mphantom id="Phantom"><mn>1</mn><mo lspace="50px">|</mo><mn>2</mn></mphantom></math>
     <math id="Math"><mn>1</mn><mo lspace="50px">|</mo><mn>2</mn></math>
+    <!-- menclose is treated as <unknown> in MathML Core -->
     <math><menclose id="Menclose" notation="box"><mn>1</mn><mo lspace="50px">|</mo><mn>2</mn></menclose></math>
     <math><mpadded id="Mpadded" lspace="10px"><mn>1</mn><mo lspace="50px">|</mo><mn>2</mn></mpadded></math>
     <math><unknown id="Unknown"><mn>1</mn><mo lspace="50px">|</mo><mn>2</mn></unknown></math>

mathml/relations/css-styling/color-004.html → mathml/relations/css-styling/color-004.tentative.html

@@ -5,8 +5,8 @@
 <title>color</title>
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#css-styling">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#text-mtext">
-<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#enclose-expression-inside-notation-menclose">
-<link rel="match" href="color-004-ref.html"/>
+<link rel="help" href="https://github.com/mathml-refresh/mathml-core/pull/24">
+<link rel="match" href="color-004.tentative-ref.html"/>
 <meta name="assert" content="Verify that the color is used for text and graphical elements of the menclose element.">
 </head>
 <body>

mathml/relations/css-styling/visibility-004.html → mathml/relations/css-styling/visibility-004.tentative.html

@@ -5,8 +5,8 @@
 <title>visibility</title>
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#css-styling">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#text-mtext">
-<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#enclose-expression-inside-notation-menclose">
-<link rel="match" href="visibility-004-ref.html"/>
+<link rel="help" href="https://github.com/mathml-refresh/mathml-core/pull/24">
+<link rel="match" href="visibility-004.tentative-ref.html"/>
 <meta name="assert" content="Verify that visibility=hidden is used for the text and graphical elements of the menclose element.">
 </head>
 <body>