Describe how to determine read-only mode.

Author: michael

README.md

@@ -982,7 +982,7 @@ Further things to consider:
 - If you make a sub-tree `contenteditable="false"`, be aware that you can't create a `contenteditable="true"` segment somewhere inside it. Svedit can only work reliably when there's one contenteditable="true" at root (it's set by `<Svedit`>)
 - `<AnnotatedTextProperty>` and `<CustomProperty>` must not be wrapped in `contenteditable="false"` to work properly.
 - Never apply `position: relative` to the direct parent of `<AnnotatedTextProperty>`, it will cause a [weird Safari bug](https://bsky.app/profile/michaelaufreiter.com/post/3lxvdqyxc622s) to destroy the DOM.
-- Never use an `<a>` tag inside a `contenteditable="true"` element, as it will cause unexpected behavior. Make it a `<div>` while editing, and an `<a>` in read-only mode.
+- Never use an `<a>` tag inside a `contenteditable="true"` element, as it will cause unexpected behavior. Make it a `<div>` while editing, and an `<a>` in read-only mode (when `svedit.editable` is `false` ).
 
 ## Full API docs?