ocda: .ssp should have all sections of abstraction

The abstraction has nine sections and includes "tail". Both artefact
writers hardcoded a list of eight, so "tail" was silently dropped.

(assisted by Claude-Code)

2 files changed, 5 insertions, 3 deletions

diff --git a/src/sisudoc/ocda/abstraction/ssp.d b/src/sisudoc/ocda/abstraction/ssp.d
index 05931b1..d29737b 100644
--- a/src/sisudoc/ocda/abstraction/ssp.d
+++ b/src/sisudoc/ocda/abstraction/ssp.d
@@ -553,9 +553,11 @@ template spineAbstractionTxt() {
     output ~= "  quotes: " ~ doc_matters.has.quotes.to!string;
     output ~= "}";
     output ~= "";
-    /+ ↓ document sections +/
+    /+ ↓ document sections - every section the abstraction holds, in document order.
+         "tail" is the end-of-document used by some output writers
+    +/
     string[] section_order = ["head", "toc", "body", "endnotes",
-      "glossary", "bibliography", "bookindex", "blurb"];
+      "glossary", "bibliography", "bookindex", "blurb", "tail"];
     foreach (section; section_order) {
       if (section !in doc_abstraction) { continue; }
       auto section_objs = doc_abstraction[section];
diff --git a/src/sisudoc/outputs/io_out/create_ocda_db.d b/src/sisudoc/outputs/io_out/create_ocda_db.d
index a47db7a..8f915fa 100644
--- a/src/sisudoc/outputs/io_out/create_ocda_db.d
+++ b/src/sisudoc/outputs/io_out/create_ocda_db.d
@@ -388,7 +388,7 @@ template spineAbstractionDb() {
     );
 
     string[] section_order = ["head", "toc", "body", "endnotes",
-      "glossary", "bibliography", "bookindex", "blurb"];
+      "glossary", "bibliography", "bookindex", "blurb", "tail"];
 
     foreach (section; section_order) {
       if (section !in doc_abstraction) continue;