time-stamp-fconcat
time-stamp-fconcat is a compiled Lisp function in `time-stamp.el
'.
(time-stamp-fconcat LIST SEP)
Similar to (mapconcat 'funcall LIST SEP) but LIST allows literals.
If an element of LIST is a symbol, it is funcalled to get the string to use;
the separator SEP is used between two strings obtained by funcalling a
symbol. Otherwise the element itself is inserted; no separator is used
around literals.