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How can I move (navigate) between Markdown ATX-style headers?

The Vim plugin https://github.com/gbgar/pandoc-sections.vim does so using the [ and ] keys, but only when there is no space between the opening # hashes and the header text.

Unfortunately, above plugin is no longer maintained and the now more common space between the opening # hashes and the header text is not supported.

The solution could be as easy as forking the plugin and extending the regex's in https://github.com/gbgar/pandoc-sections.vim/blob/master/ftplugin/pandoc/pandoc-sections.vim However, my attempts at successfully extending the regex's were in vain.

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The linked plugin gives the following regexs (modified to only include #-relevant parts):

^\s*#\a.*\n
^\s*#\{2,6}.*\n

The first requires an alphabetic character (/\a) after the #; the second does not (.*). So you could take at least the function PandocSectionMovement and keybindings if you modify the first regex to

^\s*#.*\n

Do be warned that this might catch comments in embedded code, like in the following snippet of markdown:

```bash
# this is a comment
```

You might be able to work-around that by passing {skip} to search like

" 0 stopline, timeout is like not passing a value
call search(s:movpattern, l:sflag, 0, 0,
      \ {-> synID(line('.'), col('.'), 0)->synIDattr('name') !~# 'markdownH\d'})

At, least, this worked for me on a test file with sh-like comments.

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