When considering environment variable
ASDF will skip to next configuration if it’s an empty string.
READ the string as a SEXP in the DSL
if it begins with a paren
otherwise it will be interpreted much like
as a list of paths, where
:(colon) on Unix platforms (including cygwin), by a
;(semicolon) on other platforms (mainly, Windows).
//then it instead indicates a tree in the subdirectories of which to recurse.