Remove parse error for <template><tr></tr> </template>

The spec would enable foster parenting for whitespace in template after seeing table-related markup and trigger a parse error. Whitespace in template should not be a parse error. This change should not affect the parsed tree structure, only the number of parse errors. Non-whitespace text will still go through foster parenting and is still a parse error.

Fixes #7922.

Author: zcorpan

source

@@ -114388,7 +114388,7 @@ document.body.appendChild(text);
 
   <dl class="switch">
 
-   <dt>A character token, if the <span>current node</span> is <code>table</code>, <code>tbody</code>, <code>tfoot</code>, <code>thead</code>, or <code>tr</code> element</dt> <!-- same list as foster parenting -->
+   <dt>A character token, if the <span>current node</span> is <code>table</code>, <code>tbody</code>, <code>template</code>, <code>tfoot</code>, <code>thead</code>, or <code>tr</code> element</dt> <!-- same list as foster parenting + template -->
    <dd>
      <p>Let the <dfn><var data-x="concept-pending-table-char-tokens">pending table character
      tokens</var></dfn> be an empty list of tokens.</p>