Function: f-canonical
f-canonical is a function alias for file-truename, defined in
files.el.gz.
Signature
(f-canonical FILENAME)
Documentation
Return the truename of FILENAME.
If FILENAME is not absolute, first expands it against default-directory.
The truename of a file name is found by chasing symbolic links
both at the level of the file and at the level of the directories
containing it, until no links are left at any level.