chore(markdown): Updated snippets docs for v3

markdown/dev/reference/snippets/bnotch/en.md

@@ -7,8 +7,21 @@ need an alternative to the default `notch`.
 
 It is provided by [plugin-notches](/reference/plugins/notches/).
 
-```js
-snippets.demo = new Snippet('bnotch', points.anchor)
-```
+## Example
+
+<Example caption="An example of the bnotch snippet">
+```js
+({ Point, Path, paths, Snippet, snippets, part }) => {
+
+  snippets.demo = new Snippet('bnotch', new Point(0,0))
+
+  // Prevent clipping
+  paths.diag = new Path()
+    .move(new Point(-50,-4))
+    .move(new Point(50,4))
+
+  return part
+}
+```
+</Example>
 
-<Example part="snippets_bnotch">An example of the bnotch snippet</Example>