bug or feature with 'gap-count?

[Thomas Morley]

Hi,

consider the following code:

\version "2.20.0"

{
  \override Beam.gap-count = 1
  \repeat unfold 16 b16
  \override Beam.gap = 2
  \repeat unfold 16 b16
}

Obviously no tremolo is coded, though setting 'gap-count (and 'gap
relying on active 'gap-count) is respected.
IR says:
"
gap-count (integer)
Number of gapped beams for tremolo.
"
Thus at least IR is plain wrong and the question is: bug or feature?

Cheers,
  Harm