When using Ctrl+L to create a link, the prompt says:
Insert Hyperlink
http://example.com/ "optional title"
If you actually enter enter something with a title, though, it thinks the "optional title"
is part of the URL. You get this in your markdown:
[link text][1]
[1]: http://example.com/ "optional title"
Instead of the expected:
[optional title][1]
[1]: http://example.com/