Function: nil-blank-string
nil-blank-string is a function alias for eshell-nil-blank-string,
defined in em-unix.el.gz.
This function is obsolete since 29.1; use eshell-nil-blank-string
instead.
Signature
(nil-blank-string STRING)
Documentation
Return STRING, or nil if STRING contains only blank characters.
Aliases
nil-blank-string (obsolete since 29.1)