docs: Add incorrect/correct snippets.

docs/rules/no-create.md

@@ -2,6 +2,28 @@
 
 This rule prevents the use of the static `create` function in `Observable`. Developers should use `new` and the constructor instead.
 
+## Rule details
+
+Examples of **incorrect** code for this rule:
+
+```ts
+const answers = Observable.create(subscriber => {
+  subscriber.next(42);
+  subscriber.next(54);
+  subscriber.complete();
+});
+```
+
+Examples of **correct** code for this rule:
+
+```ts
+const answers = new Observable<number>(subscriber => {
+  subscriber.next(42);
+  subscriber.next(54);
+  subscriber.complete();
+});
+```
+
 ## Options
 
 This rule has no options.