Adds spaces in titles for MD format

[McSonk]

The MD format needs a space between the "#" and the title texts, in order to see it well in the explorer.

[brianjmiller]

Currently this document is effectively deprecated and not being maintained as the underlying implementation is not considered sufficient compared to current alternatives such as cmi5. Accepting changes (even to fix formatting of markdown) would suggest it is maintained/evolving, and we'd rather not give that indication.