Md4c

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Fixes:

* [163](https://github.com/mity/md4c/issues/163):
Make HTML renderer to emit `'\n'` after the root tag when in the XHTML mode.

* [165](https://github.com/mity/md4c/issues/165):
Make HTML renderer not to percent-encode `'~'` in URLs. Although it does
work, it's not needed, and it can actually be confusing with URLs such as
`http://www.example.com/~johndoe/`.

for more info.

Fixes:

* [68](https://github.com/mity/md4c/issues/68):
Some specific HTML blocks were not recognized when EOF follows without any
end-of-line character.

* [69](https://github.com/mity/md4c/issues/69):
Strike-through span not working correctly when its opener mark is directly
followed by other opener mark; or when other closer mark directly precedes
its closer mark.

Fixes:

* [149](https://github.com/mity/md4c/issues/149):
A HTML block started in a container block (and not explicitly finished in
the block) could eat 1 line of actual contents.

* [150](https://github.com/mity/md4c/issues/150):
Fix md2html utility to output proper DOCTYPE and HTML tags when `--full-html`
command line options is used, accordingly to the expected output format
(HTML or XHTML).

* [152](https://github.com/mity/md4c/issues/152):
Suppress recognition of a permissive autolink if it would otherwise form a
complete body of an outer inline link.

* [153](https://github.com/mity/md4c/issues/153),
[154](https://github.com/mity/md4c/issues/154):
Set `MD_BLOCK_UL_DETAIL::mark` and `MD_BLOCK_OL_DETAIL::mark_delimiter`
correctly, even when the blocks are nested at the same line in a complicated
ways.

* [155](https://github.com/mity/md4c/issues/155):
Avoid reading 1 character beyond the input size in some complex cases.

Changes:

* Add `MD_TABLE_DETAIL` structure into the API. The structure describes column
count and row count of the table, and pointer to it is passed into the
application-provided block callback with the `MD_BLOCK_TABLE` block type.

Fixes:

* [131](https://github.com/mity/md4c/issues/131):
Fix handling of a reference image nested in a reference link.

* [135](https://github.com/mity/md4c/issues/135):
Handle unmatched parenthesis pairs inside a permissive URL and WWW auto-links
in a way more compatible with the GFM.

* [138](https://github.com/mity/md4c/issues/138):
The tag `<tbody></tbody>` is now suppressed whenever the table has zero body
rows.

* [139](https://github.com/mity/md4c/issues/139):
Recognize a list item mark even when EOF follows it.

* [142](https://github.com/mity/md4c/issues/142):
Fix reference link definition label matching in a case when the label ends
with a Unicode character with non-trivial case folding mapping.

Fixes:

* [130](https://github.com/mity/md4c/issues/130):
Fix `ISANYOF` macro, which could provide unexpected results when encountering
zero byte in the input text; in some cases leading to broken internal state
of the parser.

The bug could result in denial of service and possibly also to other security
implications. Applications are advised to update to 0.4.6.

Fixes:

* [118](https://github.com/mity/md4c/issues/118):
Fix HTML renderer's `MD_HTML_FLAG_VERBATIM_ENTITIES` flag, exposed in the
`md2html` utility via `--fverbatim-entities`.

* [124](https://github.com/mity/md4c/issues/124):
Fix handling of indentation of 16 or more spaces in the fenced code blocks.