Add default text for back-link component

[web-bert]

If you don't specify either html or text params there would be no text output
This adds default text of 'Back' in this case so you can call with only an href param
Closes issue #792

[NickColley]

Hey! This is looking great!

If you are able would you mind updating the examples in the review application to take advantage of this default?

https://github.com/alphagov/govuk-frontend/search?utf8=%E2%9C%93&q=govukBackLink&type=

I have also raised an issue for us to do the same in the guidance: alphagov/govuk-design-system#326

Don't worry if not, we can do this for you.

[NickColley]

Thank you for updating the CHANGELOG, we'll likely get this in the next release after #791

So you'll need to rebase once that is done, or we can clean that up for you if you want :)

[web-bert]

@NickColley I hope that is ok

[NickColley]

Awesome thanks so much!

Keep an eye on #791, once we've finished the new release we'll get this merged as part of the next release (which is likely to be 1.0.0) (and rebase the CHANGELOG addition)

[NickColley]

Hey!
We'll need to update your CHANGELOG update to move it into an unreleased section like below, I can do this for you if you want, let me know.

# Changelog

Note: We're not following semantic versioning yet, we are going to talk about this soon.

## Unreleased

 🆕 New features:

- Add default text for back-link component
  ([PR #793](https://github.com/alphagov/govuk-frontend/pull/793))

[web-bert]

Ok, I wasn't sure where it should live, I'll try and put it in the right place

[web-bert]

@NickColley I have rebased and force pushed, does that look ok?

[NickColley]

@web-bert we try to put the changelog in order of importance, so we'd put the new features above 'internal' changes.

Sorry this isn't documented, I'll make sure to fix our documentation so someone doesnt run into this again.

[web-bert]

Pushed a fixup.

Maybe it would be a good idea to create the "groups" in there by default with "None" for each one initially, so they are in the right order? This also serves to say you have made none of a specific type of change if no one removes the none and adds a message?

[NickColley]

@web-bert good idea, I'll ping you for the review of this docs update I'm working on thanks :)

[NickColley]

The fixup looks great, if you squash that into the changelog commit we'll be good to go.

[web-bert]

Done

[NickColley]

We're close but need to remove 38c9e4b from the history.

I can do this for you when I merge it in if you'd prefer since it's a pain?

[web-bert]

I have merged the two commits, not sure how to remove the commit, so if you can do that on merge that would be great.

[NickColley]

Thanks for the effort to get the commits right!

This looks great, thanks so much for helping us make GOV.UK Frontend better.

If someone else from the GOV.UK Design System team reviews and approves this we can get it merged and into the next release. 👍

[kr8n3r]

looks good, thanks

[web-bert]

No worries, I expected a bit of effort as I'm not familiar with the project as a contributor. It's all a team effort, thanks for the pointers to get it ready for merge - I look forward to seeing it in the next release.