Add space after `#` in headers to fix markdown
Add space after `#` in headers to fix markdown

Was broken by GitHub's update to their markdown parser:

https://github.com/blog/2333-a-formal-spec-for-github-flavored-markdown

> At least one space is required between the # characters and the heading’s contents, unless the heading is empty. Note that many implementations currently do not require the space. However, the space was required by the original ATX implementation [...]

https://github.github.com/gfm/#atx-headings
pkamb/Swab