afform - Add note to backlog.md about element/attribute modes

The expectation is that this is not used very much.  At the moment, we don't
have a validation mechanism to warn if this expectation is broken. But whenever
we get it, it might be good to check.

diff --git a/ext/afform/auditor/backlog.md b/ext/afform/auditor/backlog.md
index 5ea347bd03cce42414ae562f441106a6bacc19d2..9d8d08da6efd473e05e6adad9054bf2236474d78 100644 (file)
--- a/ext/afform/auditor/backlog.md
+++ b/ext/afform/auditor/backlog.md
@@ -19,3 +19,4 @@ validator to catch. Loosely/informally:
 * Accept a restricted subset of BootstrapCSS
 * Accept a restricted subset of Angular HTML
 * Accept directives created via Afform
+* Circa 5.35, afforms became strictly (e)lement mode and dropped (a)ttribute mode (#19438)