Support Trailing Forward Slashes

[imaurer]

Currently there is a hack where if a forward slash is needed at the end of a URL, you can specify the snippet at the end of the lower-most directory:

#fs

Such as:

pets#fs

Which will change:

http://.../pets

to:

http://.../pets/

Here is the magic line of code that performs this action:

specd/src/specd/model.py

Line 113 in 1e05a58

url = path.url.replace("#fs", "/")