Fix suggest edit feature

[trsvchn]

Issue

Because of symlinking to the content from the site dir the resulting location of markdown files will be
...main/site/content/ NOT ...main/content/

Example

Thus, pressing on suggest edit button redirects to 404:

In this example we get:

https://github.com/numpy/numpy-tutorials/edit/main/site/content/tutorial-svd.md

But the actual location is:

https://github.com/numpy/numpy-tutorials/edit/main/content/tutorial-svd.md

Proposed Solution

This PR just swaps content dir ant its symlink:

• content dir goes to site
• content symlink goes to the repo root dir

[rossbar]

Thanks for the suggestions @trsvchn .

The main issue seems to be that the edit this page feature of the sphinx book theme doesn't work properly because of the symlinked content structure. IMO it'd be better to keep the current symlinking structure (i.e. the site content links to content) because content is the "main" folder in some sense - i.e. for users who are running the notebooks interactively either locally or on binder.

Alternatively, maybe we could see if there is a way to accommodate the current directory structure by modifying the theme configuration, or even suggesting an additional feature to the theme if it's not currently supported.

[trsvchn]

@rossbar Thank you for your fast response on this!

ok, I'll try to look at the book theme config (thanks for the link) and try to adapt it to the current dir structure.