[lilypond-doc/f17] (9 commits) ...2.15.38.

[Jon Ciesla]

Summary of changes:

  ac64e77... 2.15.30. (*)
  136290a... 2.15.31. (*)
  4ee7831... 2.15.32. (*)
  94d323f... 2.15.33. (*)
  4bac5d9... 2.15.34. (*)
  b423a61... 2.15.35. (*)
  bc82042... 2.16.36. (*)
  6e07c1a... 2.15.37. (*)
  968bbdc... 2.15.38. (*)

(*) This commit already existed in another branch; no separate mail sent