PLIST is a property list, which is a list of the form\n\
\(PROP1 VALUE1 PROP2 VALUE2 ...). PROP is a symbol and VAL is any object.\n\
If PROP is already a property on the list, its value is set to VAL,\n\
-otherwise the new PROP VAL pair is added. The new plist is returned;
+otherwise the new PROP VAL pair is added. The new plist is returned;\n\
use `(setq x (plist-put x prop val))' to be sure to use the new value.\n\
The PLIST is modified by side effects.")
(plist, prop, val)