docs: Fix punctuation

Author: NiGhTTraX

src/index.tsx

@@ -13,7 +13,7 @@ export interface ReactMockExpectation<Props> {
    *
    * @see withProps
    *
-   * If there are no matching expectations the component will render an
+   * If there are no matching expectations, the component will render an
    * empty div.
    */
   renders: (jsx: ReactNode | ((props: Props) => ReactNode)) => ReactStub<Props>;
@@ -28,7 +28,7 @@ export interface ReactMock<Props> {
    *
    * @param expected The expected props will be shallowly matched against
    *   the props received by the component. They can be a subset of the
-   *   props to not expose private handlers e.g. when a parent
+   *   props to not expose private handlers, e.g., when a parent
    *   component sends a private onClick handler to a Button component.
    */
   withProps: (expected: DeepPartial<Props>) => ReactMockExpectation<Props>;