Merge pull request #37 from edimitchel/patch-1

docs: remove wrong information about snapshot argument

docs/src/extensibility/extensions/snapshot.md

@@ -70,7 +70,7 @@ To take a snapshot simply call the `snapshot` method returned from the store ins
 const snap = snapshot();
 ```
 
-The snapshot method also accepts an optional 2nd argument which is a function that returns a sub-branch of state. This is useful for taking more granular snapshots instead of the whole state tree.
+The snapshot method also accepts an optional argument which is a function that returns a sub-branch of state. This is useful for taking more granular snapshots instead of the whole state tree.
 
 ```typescript
 const snap = snapshot(state => state.details);
@@ -99,4 +99,4 @@ Along with the `apply` method, the snapshot function returns a `state` object. T
 const snap = snapshot();
 
 console.log(snap.state.firstName);
-```
+```