lily.scm: document a few more predicates.

diff --git a/scm/lily.scm b/scm/lily.scm
index c971758f0d2b7db2d22816196587e72536384493..9157337ad1261f35e914978c5a182913e6b93f62 100644 (file)
--- a/scm/lily.scm
+++ b/scm/lily.scm
@@ -540,6 +540,7 @@ LilyPond safe mode.  The syntax is the same as `define*-public'."
 (define-public lilypond-exported-predicates
   `((,ly:box? . "box")
     (,ly:context? . "context")
+    (,ly:context-mod? . "context modification")
     (,ly:dimension? . "dimension, in staff space")
     (,ly:dir? . "direction")
     (,ly:dispatcher? . "dispatcher")
@@ -577,6 +578,7 @@ LilyPond safe mode.  The syntax is the same as `define*-public'."
     (,ly:stream-event? . "stream event")
     (,ly:translator? . "translator")
     (,ly:translator-group? . "translator group")
+    (,ly:unpure-pure-container? . "unpure/pure container")
     ))