doc: /* Move point forward ARG words (backward if ARG is negative).
If ARG is omitted or nil, move point forward one word.
Normally returns t.
-If an edge of the buffer or a field boundary is reached, point is left there
-and the function returns nil. Field boundaries are not noticed if
-`inhibit-field-text-motion' is non-nil. */)
+If an edge of the buffer or a field boundary is reached, point is
+left there and the function returns nil. Field boundaries are not
+noticed if `inhibit-field-text-motion' is non-nil.
+
+The word boundaries are normally determined by the buffer's syntax
+table, but `find-word-boundary-function-table', such as set up
+by `subword-mode', can change that. If a Lisp program needs to
+move by words determined strictly by the syntax table, it should
+use `forward-word-strictly' instead. */)
(Lisp_Object arg)
{
Lisp_Object tmp;