cli: emit "-" for an absent week, keeping output column-safe

week is "" for roughly 30 days a year (any day outside a numbered
week). Printed as-is among seven space-separated fields, that collapses
two fields into a double space, so naive field-position parsing (e.g.
awk '{print $4}') silently reads the wrong column on those days -- a
real defect for a project whose stated design is Unix-composable CLIs.
Emit "-" instead, so every line always has exactly seven
single-space-separated fields.

Record.headers/to_row exist for exactly this kind of column-safe
encoding but use a different column set and order than this CLI's
documented date/weekday/season/week/slug/rank/colour format (design
spec §6); adopting them here would be a larger, unrequested format
change, so this keeps the CLI's own field list and only substitutes
the empty value.

The cram test's pinned lines are re-verified against liturgical
anchors before promoting, not blind-promoted: 1 Jan 2026 (Circumcision,
class-1, white) and 2-3 Jan (ordinary class-4 Christmastide ferias,
the finding-1 slug fix already re-pinned separately) are correct;
2026-04-05 remains the sole Easter Sunday line, Paschaltide week 1,
class-1, white, matching the independently-computed Easter anchors
printed by `colitur easter 2026` immediately above in the same file.

1 files changed, 7 insertions, 1 deletions

diff --git a/bin/main.ml b/bin/main.ml
index 827e6f2..896a6bd 100644
--- a/bin/main.ml
+++ b/bin/main.ml
@@ -21,6 +21,12 @@ let temporal_report y =
     | Ok t -> t
     | Error e -> failwith e
   in
+  (* [week] is "" for roughly 30 days a year (outside any numbered week);
+     printed as-is, that collapses two of the seven space-separated fields
+     into a double space, so naive field-position parsing (e.g. awk '{print
+     $4}') silently reads the wrong column on those days. Emit "-" instead,
+     so every line always has exactly seven single-space-separated fields. *)
+  let field s = if s = "" then "-" else s in
   let d = ref jan1 in
   while D.compare !d dec31 <= 0 do
     let t = Rite_ef.Temporal_ef.temporal !d in
@@ -30,7 +36,7 @@ let temporal_report y =
     in
     Printf.printf "%s %s %s %s %s %s %s\n" r.Colitur_kernel.Record.date
       r.Colitur_kernel.Record.weekday r.Colitur_kernel.Record.season
-      r.Colitur_kernel.Record.week r.Colitur_kernel.Record.slug
+      (field r.Colitur_kernel.Record.week) r.Colitur_kernel.Record.slug
       r.Colitur_kernel.Record.rank r.Colitur_kernel.Record.colour;
     d := D.add_days !d 1
   done