Function: nil-blank-string
nil-blank-string is a byte-compiled function defined in em-unix.el.gz.
Signature
(nil-blank-string STRING)
Documentation
Return STRING, or nil if STRING contains only blank characters.
Source Code
;; Defined in /usr/src/emacs/lisp/eshell/em-unix.el.gz
(defun nil-blank-string (string)
"Return STRING, or nil if STRING contains only blank characters."
(cond
((string-match "[^[:blank:]]" string) string)
(nil)))