bug or bad wording in manual?

[Graham Percival]

no-reset
 This is the same as default but with accidentals lasting  “forever” 
and not only until the next measure

If I understand that sentence correctly, then in the below example 
(taken from the manual, BTW), the second cis should have no accidental. 
 However, in 2.3.16 it does.  Is this a bug, or have I misunderstood 
the no-rest style?


\version "2.3.16"
\bookpaper {raggedright = ##t }
{ \relative c' {
#(set-accidental-style 'no-reset)
c1 cis cis c
}}