remove markdown remnant & unnecessary whitespace

docs/ref-01-top-level-api.md

@@ -93,7 +93,7 @@ If the optional callback is provided, it will be executed after the component is
 > inside are replaced when first called. Later calls use React’s DOM diffing algorithm for efficient
 > updates.
 >
-> \* `React.render()` does not modify the container node (only modifies the children of the container). In
+> `React.render()` does not modify the container node (only modifies the children of the container). In
 > the future, it may be possible to insert a component to an existing DOM node without overwriting
 > the existing children.