Problem publishing issues with Markdown #739
Description
When exporting an document with doorstop publish ISSUE ./html it hangs. It has to do with indentation of lists in the yaml file text and I've created an repo with an issue that reproduces it with v3.0.2 of doorstop (https://github.com/colob/doorstep-html-issue)
Basically there is an extra indentation before each list item which makes the publish fail (have to break out of the program with CTRL-C) since it's in an infinite loop eating up loads and loads of memory.