fix: allow a tab or end of input after a type 6 html block tag name

the type 6 html block start only accepted spaces, a newline, > or /> after the tag name. commonmark 0.31.2 also allows a tab and the end of the line, which includes the end of the input.

src/rules.ts

@@ -162,7 +162,7 @@ const html = edit(
 + '|<\\?[\\s\\S]*?(?:\\?>[^\\n]*\\n*|$)' // (3)
 + '|<![A-Z][\\s\\S]*?(?:>[^\\n]*\\n*|$)' // (4)
 + '|<!\\[CDATA\\[[\\s\\S]*?(?:\\]\\]>[^\\n]*\\n*|$)' // (5)
-+ '|</?(tag)(?: +|\\n|/?>)[\\s\\S]*?(?:(?:\\n[ \t]*)+\\n|$)' // (6)
++ '|</?(tag)(?:[ \\t]+|\\n|/?>|$)[\\s\\S]*?(?:(?:\\n[ \t]*)+\\n|$)' // (6)
 + '|<(?!(?:script|pre|style|textarea)(?![a-z0-9-]))([a-z][a-z0-9-]*)(?:attribute)*? */?>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:(?:\\n[ \t]*)+\\n|$)' // (7) open tag
 + '|</[a-z][a-z0-9-]*\\s*>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:(?:\\n[ \t]*)+\\n|$)' // (7) closing tag
 + ')', 'i')

test/specs/new/html_block_tab_after_tag_name.html

@@ -0,0 +1,15 @@
+<div	class="x">
+*stays raw*
+</div>
+<TABLE	class="x"><tr><td>
+*stays raw*
+</td></tr></TABLE>
+<div	
+class="x">
+*stays raw*
+</div>
+<blockquote>
+<div	class="x">
+*stays raw*
+</div>
+</blockquote>

test/specs/new/html_block_tab_after_tag_name.md

@@ -0,0 +1,16 @@
+<div	class="x">
+*stays raw*
+</div>
+
+<TABLE	class="x"><tr><td>
+*stays raw*
+</td></tr></TABLE>
+
+<div	
+class="x">
+*stays raw*
+</div>
+
+> <div	class="x">
+> *stays raw*
+> </div>

test/specs/new/html_block_tag_at_end_of_input.html

@@ -0,0 +1,2 @@
+<p>Paragraph</p>
+<div

test/specs/new/html_block_tag_at_end_of_input.md

@@ -0,0 +1,3 @@
+Paragraph
+
+<div