The function withInfo in @storybook/addon-info should accept 0 or 1 argument (#27733)

* The function withInfo in @storybook/addon-info should be able to accept no arguments.

* The function withInfo in @storybook/addon-info should be able to accept no arguments.

* The function withInfo in @storybook/addon-info should be able to accept no arguments.

* Corrected the version number of @storybook/addon-info. This type definition was only tested with version 3.4.8 of @storybook/addon-info

* Corrected the version number of @storybook/addon-info. This type definition was only tested with version 3.4.8 of @storybook/addon-info

types/storybook__addon-info/index.d.ts

@@ -1,4 +1,4 @@
-// Type definitions for @storybook/addon-info 3.2
+// Type definitions for @storybook/addon-info 3.4
 // Project: https://github.com/storybooks/storybook
 // Definitions by: Mark Kornblum <https://github.com/mkornblum>
 //                 Mattias Wikstrom <https://github.com/fyrkant>
@@ -29,6 +29,6 @@ export interface Options {
   maxPropStringLength?: number;
 }
 
-export function withInfo(textOrOptions: string | Options): (storyFn: RenderFunction) => (context?: object) => React.ReactElement<WrapStoryProps>;
+export function withInfo(textOrOptions?: string | Options): (storyFn: RenderFunction) => (context?: object) => React.ReactElement<WrapStoryProps>;
 
 export function setDefaults(newDefaults: Options): Options;

types/storybook__addon-info/storybook__addon-info-tests.tsx

@@ -12,6 +12,11 @@ setDefaults({
 });
 
 storiesOf('Component', module)
+  .add('no info',
+       withInfo()(() =>
+         <Component>Click the "?" mark at top-right to view the info.</Component>
+       )
+  )
   .add('simple info',
        withInfo('doc string about my component')(() =>
          <Component>Click the "?" mark at top-right to view the info.</Component>