Function: user-variable-p
user-variable-p is a for custom-variable-p, defined in
custom.el.gz.
This function is obsolete since 24.3; use custom-variable-p instead.
Signature
(user-variable-p VARIABLE)
Documentation
Return non-nil if VARIABLE is a customizable variable.
A customizable variable is either (i) a variable whose property
list contains a non-nil standard-value or custom-autoload
property, or (ii) an alias for another customizable variable.
Probably introduced at or before Emacs version 17.
Aliases
user-variable-p (obsolete since 24.3)