setting up hyperlinks are not keeping full url path

[twilson63]

When I create a hyperlink in markdown, if I do not leave a trailing / it will not keep the sub path when in the sub folder.

index.md

* [lesson1](1-lesson1/)

then inside the path /lesson1 I can reference local files

[Exercises](/exercises)

At some point I should be able to just to include the name of the path without the slash and it should remember the path.