Function: org-file-name-concat
org-file-name-concat is a function alias for file-name-concat, defined
in fileio.c.
Signature
(org-file-name-concat DIRECTORY &rest COMPONENTS)
Documentation
Append COMPONENTS to DIRECTORY and return the resulting string.
Each element in COMPONENTS must be a string or nil.
DIRECTORY or the non-final elements in COMPONENTS may or may not end
with a slash -- if they don't end with a slash, a slash will be
inserted before concatenating.
In most cases, one or more calls to expand-file-name are better
suited for the job than this function. Use this function only if
some of the special expansions done by expand-file-name get in
the way of what your program needs to do.