message: chore: fix add datasource help string
diff: @@ -87,6 +87,7 @@ export default class AddSliceContainer extends React.PureComponent {
  <Panel.Body>
  <div>
  <p>{t('Choose a datasource')}</p>
  + <p>
  <div style={styleSelectWidth}>
  <Select
  clearable={false}
  @@ -100,16 +101,19 @@ export default class AddSliceContainer extends React.PureComponent {
  width={600}
  />
  </div>
  - <p className="text-muted">
  + </p>
  + <span className="text-muted">
  {t(
  - 'If the datasource you are looking for is not ' +
  - 'available in the list, ' +
  - 'follow the instructions on the how to add it on the ',
  - )}
  - <a href="https://superset.apache.org/tutorial.html">
  - {t('Superset tutorial')}
  + 'If the datasource you are looking for is not available in the list, follow the instructions on how to add it in the Superset tutorial.',
  + )}{' '}
  + <a
  + href="https://superset.apache.org/tutorial.html#adding-a-new-table"
  + rel="noopener noreferrer"
  + target="_blank"
  + >
  + <i className="fa fa-external-link" />
  </a>
  - </p>
  + </span>
  </div>
  <br />
  <div>
  