Add tabspaces-session-file to no-littering

[Gokul Das]

I have submitted a PR to the no-littering emacs package to include configuration of tabspaces' tabspaces-session-file variable.

No-littering package is an attempt to keep user-emacs-directory and source directories tidy by assigning standard locations for data and config files. The files and directories are also expected to follow certain naming conventions.

In addition to informing you, I hope you can confirm that this is the only data file saved by tabspaces.

Thanks!

PS: A discussion thread would have been more appropriate for this. Please feel free to close this issue.

[Colin McLear]

Thanks very much for this. And yes -- the sessions file is the only data file saved by tabspaces.