fix(cli): close the flavour-list call sites Typst's addition exposed

The task this branch of work set out to test was whether the template
engine is genuinely flavour-agnostic outside lib/render/escape.ml. It
is not, quite: bin/main.ml's own --flavour error/help text and both
man pages hand-typed the flavour list and its count ("the six
flavours") as literal prose, so adding Typst as a seventh left three
places silently wrong (an incomplete flavour list in two error
messages, and "six" where the true count is now seven) until this
commit.

bin/main.ml's two error messages (unknown --flavour value, and cannot
infer a flavour from an extension) now build their flavour list by
walking Escape.all/to_string instead of a literal string, so the next
flavour added will not reintroduce the same drift; the static --help
body text and colitur(1)/colitur-templates(5) still name flavours and
their count by hand; there was no equivalent gain available for
prose formatted this specifically, so those were updated by hand
instead, along with colitur-templates(5)'s FLAVOURS section, which
gained typst's own subsection alongside latex/groff/html/xml/ics/none.

test/cli.t's two pinned error-text assertions are updated to match,
and gained a new case: .typ inferred from extension, and a real
shipped citation's hyphen surviving --flavour typst's own escaping
live, the same shape the 2035 Ss. Petri et Pauli case already proves
for latex's ampersand just above it.

1 files changed, 41 insertions, 4 deletions

diff --git a/man/colitur-templates.5 b/man/colitur-templates.5
index 06ad583..e04560b 100644
--- a/man/colitur-templates.5
+++ b/man/colitur-templates.5
@@ -303,9 +303,9 @@ same file exactly as any other tag would).
 selects how an interpolated
 .I value
 is escaped before being written. It never touches the template's own literal
-markup (the LaTeX, groff, HTML, XML or ICS surrounding a
+markup (the LaTeX, Typst, groff, HTML, XML or ICS surrounding a
 .BR {{tag}} ),
-which is the template author's and is trusted exactly as written. One of six:
+which is the template author's and is trusted exactly as written. One of seven:
 .TP
 .B latex
 .BR \e " \(-> " \etextbackslash{} ,
@@ -320,6 +320,42 @@ which is the template author's and is trusted exactly as written. One of six:
 .BR ~ " \(-> " \etextasciitilde{} .
 Every LaTeX special character is covered; nothing else is touched.
 .TP
+.B typst
+.BR \e " \(-> " \e\e ,
+.BR # " \(-> " \e# ,
+.BR * " \(-> " \e* ,
+.BR _ " \(-> " \e_ ,
+.BR $ " \(-> " \e$ ,
+.BR @ " \(-> " \e@ ,
+.BR < " \(-> " \e< ,
+.BR > " \(-> " \e> ,
+.BR \(ga " \(-> " \e\(ga ,
+.BR ~ " \(-> " \e~ ,
+.BR \- " \(-> " \e\- .
+Verified against the installed
+.B typst
+binary rather than assumed: each escaped character was confirmed to survive
+as the literal character, and each was separately confirmed to do something
+else when left bare
+.RB ( # " opens code mode, " * / _ " toggle strong/emph, " $ " opens math, "
+.B @
+opens a reference \(em a bare unresolved
+.B @word
+is a hard
+.B typst
+compile error, not merely mangled output \(em
+.BR < / > " can close around a bare word into label syntax that swallows it, "
+.B \(ga
+opens raw text, and
+.B ~
+is a non\-breaking space). A run of two or three unescaped hyphens becomes an
+en or em dash; every
+.B \-
+is escaped unconditionally, not only inside a detected run, since escaping
+is applied one character at a time with no lookahead \(em confirmed live that
+escaping every hyphen independently still typesets as literal hyphens for a
+run of any length.
+.TP
 .B groff
 A backslash is escaped to
 .BR \ee ,
@@ -373,6 +409,7 @@ own file extension when the flag is omitted:
 .nf
 
 .I .tex              \(-> latex
+.I .typ              \(-> typst
 .I .ms .mom .me      \(-> groff
 .I .html .htm        \(-> html
 .I .xml              \(-> xml
@@ -385,7 +422,7 @@ An extension
 .B colitur
 does not recognise is a hard
 .B ERROR
-naming the six flavours above; it is
+naming the seven flavours above; it is
 .I never
 a silent fallback to
 .BR none .
@@ -401,7 +438,7 @@ flavour (selected for
 as well as
 .IR .txt )
 passes every interpolated value through unchanged. This is a deliberate
-choice, not a gap: unlike LaTeX, groff, HTML, XML or ICS, AsciiDoc and
+choice, not a gap: unlike LaTeX, Typst, groff, HTML, XML or ICS, AsciiDoc and
 Markdown have no fixed, small metacharacter set that could be escaped
 mechanically \(em their own metacharacters are context\-dependent (a
 .B *