-\fIstr\fR on the given window. It is similar to calling \fBwaddch\fR once for
-each character in the string. The four routines with \fIn\fR as the last
-argument write at most \fIn\fR characters. If \fIn\fR is -1, then the
-entire string will be added.
+\fIstr\fR on the given window.
+It is similar to calling \fBwaddch\fR once for each character in the string.
+The four routines with \fIn\fR as the last argument
+write at most \fIn\fR characters.
+If \fIn\fR is -1, then the entire string will be added,
+up to the maximum number of characters that will fit on the line,
+or until a terminating null is reached.