maximumFretStretch in Manual, tablatures section ?

[Éric]

Hello,

in this exemple, the 1rst chord is the default calculation of tablature but
not what I want.
The 2nd chord get an error message even your intuition do not…
The 3rd chord showing what I want. 

\version "2.19.60"

\score {
  \new TabStaff
  { <c' bes'> <c'\2 bes'> <c'\2 bes'\1> }
}


The maximumFretStretch is set to 4 by default in translation.init.scm
Lilypond files, while this chord is a 5 stretched.
(yes, it can happen, specialy in highter notes position, where frets are
less large, or if you play a small instrument)

Looking to the manuel, the property maximumFretStretch is only belonging to
Fretboards context.
Don't you think that it should be mentionned  in the Tablature section of
the manual that, at least, you have to type all the string numbers involved
in a more than default stretch ?

By the way, is there a way to override this default, just for a score or a
section of it ? 
(yes, one day I will learn Scheme !!)

Éric



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