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, 48 insertions, 8 deletions

diff --git a/lang/la.ini b/lang/la.ini
index 821acff..197ed64 100644
--- a/lang/la.ini
+++ b/lang/la.ini
@@ -2041,12 +2041,22 @@ romans.full            = Epistola ad Romanos
 ; scan1.txt:5636-5637 "Lectio Epistolae beati Pauli Apostoli / ad Romanos."
 romans.abbr            = Rom
 ; scan1.txt:4878 "Rom. 13,", also 4972/6880.
-corinthians_1.full     = Epistola ad Corinthios
+corinthians_1.full     = Epistola I ad Corinthios
+; CONSTRUCTED -- the Missal's incipit for this letter names the
+; recipient but not the volume, so on its own it does not identify WHICH
+; of the two and is not a valid full title for either. The numeral is the
+; sourced locator's own, in Roman to match this project's output
+; convention. Same reasoning as kings_3.full.
 ; scan1.txt:5576 "Lectio Epistolae beati Pauli Apostoli / ad Corinthios." --
 ; see the header's UNDIFFERENTIATED INCIPITS note.
 corinthians_1.abbr     = 1 Cor
 ; scan1.txt:5576 "1 Cor. 4, 1-5", also 19561/21847.
-corinthians_2.full     = Epistola ad Corinthios
+corinthians_2.full     = Epistola II ad Corinthios
+; CONSTRUCTED -- the Missal's incipit for this letter names the
+; recipient but not the volume, so on its own it does not identify WHICH
+; of the two and is not a valid full title for either. The numeral is the
+; sourced locator's own, in Roman to match this project's output
+; convention. Same reasoning as kings_3.full.
 ; Shared incipit -- see corinthians_1.full's own citation.
 corinthians_2.abbr     = 2 Cor
 ; scan1.txt:22755 "2 Cor. 3, 4-9", also 8068/29417/31759.
@@ -2071,24 +2081,44 @@ colossians.full        = Epistola ad Colossenses
 ; -- CORRECTS the sourcing note.
 colossians.abbr        = Col
 ; scan1.txt:6798 "Col. 3,", also 7234/15349.
-thessalonians_1.full   = Epistola ad Thessalonicenses
+thessalonians_1.full   = Epistola I ad Thessalonicenses
+; CONSTRUCTED -- the Missal's incipit for this letter names the
+; recipient but not the volume, so on its own it does not identify WHICH
+; of the two and is not a valid full title for either. The numeral is the
+; sourced locator's own, in Roman to match this project's output
+; convention. Same reasoning as kings_3.full.
 ; scan1.txt:8942-8944 "Lectio Epistolae beati Pauli Apostoli / ad
 ; Thessalonicenses. 1 Thess. 4,1-7" -- CORRECTS the sourcing note; see the
 ; header's UNDIFFERENTIATED INCIPITS note.
 thessalonians_1.abbr   = 1 Thess
 ; scan1.txt:8944, same line as the .full citation.
-thessalonians_2.full   = Epistola ad Thessalonicenses
+thessalonians_2.full   = Epistola II ad Thessalonicenses
+; CONSTRUCTED -- the Missal's incipit for this letter names the
+; recipient but not the volume, so on its own it does not identify WHICH
+; of the two and is not a valid full title for either. The numeral is the
+; sourced locator's own, in Roman to match this project's output
+; convention. Same reasoning as kings_3.full.
 ; scan1.txt:5498-5500 "Lectio Epistolae beati Pauli Apostoli / ad
 ; Thessalonicenses. 2 Thess. 2,1-8" -- CORRECTS the sourcing note.
 thessalonians_2.abbr   = 2 Thess
 ; scan1.txt:5500, same line as the .full citation.
-timothy_1.full         = Epistola ad Timotheum
+timothy_1.full         = Epistola I ad Timotheum
+; CONSTRUCTED -- the Missal's incipit for this letter names the
+; recipient but not the volume, so on its own it does not identify WHICH
+; of the two and is not a valid full title for either. The numeral is the
+; sourced locator's own, in Roman to match this project's output
+; convention. Same reasoning as kings_3.full.
 ; scan1.txt:25898-25899 "Lectio Epistolae beati Pauli Apostoli / ad
 ; Timotheum. 1 Tim. 6, 11-16" -- see the header's UNDIFFERENTIATED INCIPITS
 ; note.
 timothy_1.abbr         = 1 Tim
 ; scan1.txt:25899, same line as the .full citation.
-timothy_2.full         = Epistola ad Timotheum
+timothy_2.full         = Epistola II ad Timotheum
+; CONSTRUCTED -- the Missal's incipit for this letter names the
+; recipient but not the volume, so on its own it does not identify WHICH
+; of the two and is not a valid full title for either. The numeral is the
+; sourced locator's own, in Roman to match this project's output
+; convention. Same reasoning as kings_3.full.
 ; Shared incipit -- see timothy_1.full's own citation, plus scan1.txt:31361
 ; "Lectio Epistolae beati Pauli Apostoli / ad Timotheum. 2 Tim. 4, 1-8".
 timothy_2.abbr         = 2 Tim
@@ -2121,7 +2151,12 @@ james.abbr             = Iac
 ; "Iacobi" above, matching the 3-4 letter convention every other abbreviated
 ; form in this section actually attests (Gal, Col, Phil, Hebr, ...), not a
 ; separately-sourced locator.
-peter_1.full           = Epistola beati Petri Apostoli
+peter_1.full           = Epistola I beati Petri Apostoli
+; CONSTRUCTED -- the Missal's incipit for this letter names the
+; recipient but not the volume, so on its own it does not identify WHICH
+; of the two and is not a valid full title for either. The numeral is the
+; sourced locator's own, in Roman to match this project's output
+; convention. Same reasoning as kings_3.full.
 ; scan1.txt:20021 "Lectio Epistolae beati Petri Apostoli.", also
 ; 20080/20264/20324/20784/22128/27337/30003/31627 -- CORRECTS the sourcing
 ; note; see the header's UNDIFFERENTIATED INCIPITS note (shared with
@@ -2131,7 +2166,12 @@ peter_1.abbr           = 1 Petri
 ; Easter octave) -- the Missal's own locators for both Peter epistles use
 ; the unabbreviated genitive "Petri", not a further-truncated "Pet." form
 ; (checked: no "1 Pet."/"2 Pet." instance in either scan).
-peter_2.full           = Epistola beati Petri Apostoli
+peter_2.full           = Epistola II beati Petri Apostoli
+; CONSTRUCTED -- the Missal's incipit for this letter names the
+; recipient but not the volume, so on its own it does not identify WHICH
+; of the two and is not a valid full title for either. The numeral is the
+; sourced locator's own, in Roman to match this project's output
+; convention. Same reasoning as kings_3.full.
 ; Shared incipit -- see peter_1.full's own citation, plus scan1.txt:34670
 ; "Lectio Epistolae beati Petri Apostoli. / 2 Petri 1, 16-19" directly.
 peter_2.abbr           = 2 Petri