Repl's unknown-language refusal names a few whole and points to the rest

The refusal listed every language and was clipped to fit, ending mid-word.
It now names six, those that start as the word did first (pithon:
python), says how many more, and points at docs/tags.md, which lists them
all.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 5 insertions, 1 deletions

diff --git a/docs/tags.md b/docs/tags.md
index a113d86a..2cd3f16b 100644
--- a/docs/tags.md
+++ b/docs/tags.md
@@ -19,7 +19,11 @@ one, since other arguments (a dump's name) may contain `+`. A command pane's tag
 and offers `Kill`. `Repl python` in a terminal's tag binds it as Python's
 REPL, its id, `python-a`, beside the Tty word: a middle click or the execute
 key on a `.py` body then types the text into it rather than running it, and
-several bound ask which. The tag's own words, `Exec <text>` by name and a
+several bound ask which. `Repl` takes any language a code fence names
+(`py`, `Python`, `sh`): ada, bash, c, c_sharp, clojure, cpp, css, elixir,
+erlang, fortran, go, haskell, html, java, javascript, json, kotlin, ocaml,
+markdown, pascal, php, powershell, python, ruby, rust, scala, typst, zig;
+an unknown one is refused, naming a few of these. The tag's own words, `Exec <text>` by name and a
 command word @`cmd` still run as commands (docs/fs.md).
 A tag word runs as acme's does, in the pane's directory with no file named:
 `wc` alone waits on its stdin. pardes has no `$%` for the pane's file; name