Merge branch 'robustness-and-hackability'

An audit of the shipped program, plus the fixes it found.

The citation parser accepted OCaml integer-literal syntax, so a typo like
'Luke 1_1:5' silently became a different chapter. Four pairs of different
books shared a full title -- 1 and 2 Corinthians both rendered 'Epistola
ad Corinthios' -- leaving 108 citations in 2027 alone that a reader could
not resolve to a book. Spec section 8.5 is now delivered rather than
recorded: shipped styles re-parse their own output. Overlay errors no
longer name OCaml source files at the reader.

Also: the new-overlay scaffold shows citations at the right nesting
level, config --show validates before printing, error messages no longer
echo whole file lines, and a month answers to both spellings of its own
name.

1 files changed, 5 insertions, 5 deletions

diff --git a/test/cli.t b/test/cli.t
index b44a256..fe18800 100644
--- a/test/cli.t
+++ b/test/cli.t
@@ -1374,12 +1374,12 @@ fallback: `Colitur_citation.Render.with_book` takes a closed variant, not an
 arbitrary string, so anything other than "full"/"abbr" could never mean
 anything downstream.
 
+STDOUT STAYS EMPTY. The check used to happen partway down the table, so this
+exited 2 having already written five rows -- a caller redirecting stdout to a
+file got a truncated but plausible-looking report beside a non-zero status.
+Validation now runs before anything is printed.
+
   $ XDG_CONFIG_HOME=xdg-sigla colitur config --show --sigla-book bogus
-  config file: xdg-sigla/colitur/config.ini (not found)
-  lang             la                       (default)
-  template         (none)                   (default)
-  format           (none)                   (default)
-  sigla_style      la                       (default)
   colitur: unknown --sigla-book "bogus" (want "full" or "abbr")
   [2]