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.

com/kdesc.cpp

@@ -201,6 +201,13 @@ void describe_katoms(bool show_regex)
     std::cout << "\n" << M.apply(text_target()) << "\n\n";
 }
 
+void show_katom_rewrite_patterns()
+{
+    Machine M = ref_machine();
+    M.read_string("@katom_rewrite_patterns@");
+    std::cout << "\n" << M.apply(text_target()) << "\n\n";
+}
+
 int main(int argc, char* argv[])
 {
     try {
@@ -269,7 +276,7 @@ int main(int argc, char* argv[])
         }
 
         if (p("rewrite")) {
-            describe_rewrite_patterns();
+            show_katom_rewrite_patterns();
         }
 
         // The --typeface subcommands operate on the Klammertext font store