documenting `elbow-hairpin`?

[Werner LEMBERG]

Function `elbow-hairpin` is defined as

  (define ((elbowed-hairpin coords mirrored?) grob)
   ...

  (export elbowed-hairpin)

Functions `flared-hairpin` and `constante-hairpin` are defined as

  (define-public flared-hairpin
    (elbowed-hairpin '((0 . 0) (0.95 . 0.4) (1.0 . 1.0)) #t))

  (define-public constante-hairpin
    (elbowed-hairpin '((0 . 0) (1.0 . 0.0) (1.0 . 1.0)) #f))

respectively.  This has the consequence that the main function
`elbow-hairpin` is not documented in `notation.pdf`, and
`flared-hairpin` and `constante-hairpin` both have exactly the same
documentation (namely the documentation string from
`elbowed-hairpin`).

Can this be improved somehow?


    Werner