Github gist editing without changing URL

Question

I have a gist with some javascript code in a script tag, like so:

Answer 1

In case of gist,
https://raw.github.com/gist/[gist_id] OR
https://gist.github.com/[user_name]/[gist_id]/raw(which is more likely to be an unique URI.)
returns first file from the gist.

For gist with multiple files, https://raw.github.com/gist/[gist_id]/[file_name]

The url works even when you change the filename.

e.g. https://raw.github.com/gist/4636655 https://raw.github.com/gist/4636655/imdb-getglue.js