Fix perserveComments on ssr (#4730)

[confraria]

Fixes #4730

Should I create a test in server-side-rendering/samples or the existing one in js/samples/ssr-preserve-comments is enough?

Adding the test in server-side-rendering will require an extra config flag to not use assert.htmlEqual on that specific test, as it removes comments.

[bwbroersma]

First of all thanks for making a PR for my issue 🙂

Adding the test in server-side-rendering will require an extra config flag to not use assert.htmlEqual on that specific test, as it removes comments.

I needed to patch this behavior in #4737 anyway, see my solution.

[confraria]

😀 i had something similar but after discovering the existing test I removed it.
So since you already have a another PR should I close this one?

[bwbroersma]

Please don't close this one, my other PR is just for whitespace! 🙂

[confraria]

ah of course.. 🤦
Should I add another test to server-side-rendering/samples then?

[tanhauhau]

hmm.. i see @Rich-Harris didn't follow up on his promise over there: #3539 (comment)

[confraria]

oh this is still open 🙃 is it still relevant? I can try to solve the conflict

[tanhauhau]

no worries, i've rebased and fixed the conflicts