3 files changed, 7 insertions, 5 deletions
diff --git a/gleam/src/write/epub.gleam b/gleam/src/write/epub.gleam
index 77f4f42..e035393 100644
--- a/gleam/src/write/epub.gleam
+++ b/gleam/src/write/epub.gleam
@@ -252,7 +252,7 @@ fn inline_anchor() -> regexp.Regexp {
 fn note_mark() -> regexp.Regexp {
   let assert Ok(r) =
     regexp.compile(
-      "【(\\d+|(?:[*]|[+])+)\\s",
+      "【(\\d+|[*+]+[0-9]*)\\s",
       regexp.Options(case_insensitive: False, multi_line: True),
     )
   r
diff --git a/gleam/src/write/rgx.gleam b/gleam/src/write/rgx.gleam
index 71add21..1bc525f 100644
--- a/gleam/src/write/rgx.gleam
+++ b/gleam/src/write/rgx.gleam
@@ -174,7 +174,7 @@ fn apply(
 /// A note's mark may be a number or a run of stars or pluses, and both are
 /// gathered into the endnotes section, so both need a reference.
 pub fn inline_notes_any_mark() -> Regexp {
-  re("【(\\d+|(?:[*]|[+])+)\\s+(.+?)\\s*】")
+  re("【(\\d+|[*+]+[0-9]*)\\s+(.+?)\\s*】")
 }
 
 /// A link before its url has been substituted in: the number is an index into
diff --git a/gleam/src/write/text.gleam b/gleam/src/write/text.gleam
index 2e44e3a..77897d5 100644
--- a/gleam/src/write/text.gleam
+++ b/gleam/src/write/text.gleam
@@ -80,9 +80,11 @@ fn toc_depths(doc: Document) -> Dict(Int, Int) {
 /// and an output that loses it silently cannot be checked.
 fn object(obj: Object, depths: Dict(Int, Int)) -> String {
   // an object with no text of its own writes nothing. A poem is such an
-  // object: it is a container that closes a run of verses and carries the
-  // *same* object number as the last of them, so writing it would put that
-  // number in the file twice - 15 times over in one sample.
+  // object: a container of the verses that follow it, which are what is
+  // written. Since format 2.1 it carries object number 0 and states the
+  // range of its verses; before, it closed the run carrying the *same*
+  // number as the last verse, and writing it put that number in the file
+  // twice - 15 times over in one sample. Both forms write nothing.
   // and a dummy heading writes nothing: it is generated furniture whose text
   // repeats the heading above it, and every other writer here drops it.
   // Spine's text keeps it, so a trailing section's name is in the file twice.