Addon-docs: docsOnly parameter generates rte

[atanasster]

Describe the bug
using the new docsOnly parameter on a story generates a run time exception

To Reproduce
following story in an mdx file:

<Story name='docs-only-story' parameters={{ docsOnly: true } }>
  <Button onClick={action('clicked')}>preview source</Button>
</Story>

Screenshots

System:

 System:
    OS: macOS 10.14.1
    CPU: (8) x64 Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz
  Binaries:
    Node: 12.1.0 - /usr/local/bin/node
    Yarn: 1.17.3 - /usr/local/bin/yarn
    npm: 6.10.3 - /usr/local/bin/npm
  Browsers:
    Chrome: 76.0.3809.132
    Firefox: 66.0.5
    Safari: 12.0.1

[shilman]

It's an internal parameter, probably should be renamed with ___prefix. But that does look like a bug!

[atanasster]

the navigation is not expecting it to be hidden (the tree view and also the next/prev stories), found it while I was exploring #7844

[stale]

Hi everyone! Seems like there hasn't been much going on in this issue lately. If there are still questions, comments, or bugs, please feel free to continue the discussion. Unfortunately, we don't have time to get to every issue. We are always open to contributions so please send us a pull request if you would like to help. Inactive issues will be closed after 30 days. Thanks!

[stale]

Hey there, it's me again! I am going close this issue to help our maintainers focus on the current development roadmap instead. If the issue mentioned is still a concern, please open a new ticket and mention this old one. Cheers and thanks for using Storybook!