kdesc --rewrite from the reflection klammerset; txt caption rules the block's width

Assembled from klammertext-dev e99530408517. The katom rewrite patterns
are rendered from ref/ (a table in dispatch order, patterns through @c),
the procedural listing having left mac/; a plain-text caption's rule is
as long as the table or listing it captions; the editor-support comments
name the tools' new dev/ location.

doc/edit/README.md

@@ -75,7 +75,7 @@ Two kinds of artifact cannot read it and restate parts of it by hand:
 
 ## Testing
 
-`tst/editor_test.sh` (run by `dbg/rebuild.sh` and `make -C tst test`)
+`tst/editor_test.sh` (run by `dev/rebuild.sh` and `make -C tst test`)
 drives the fixture pairs in `tst/editor/` through the shared core's API
 and CLI, checks idempotence, checks the Emacs implementation for
 byte-equality, runs the language server through a scripted LSP client