Update open-source-on-travis-ci-com.md

[Zearin]

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[plaindocs]

Hi @Zearin

Thanks for these changes. I don't really mind either way about the line breaks, but your link syntax isn't working. See the preview here https://deploy-preview-1883--musing-lamport-7fb66c.netlify.com/user/open-source-on-travis-ci-com/

We're using Kramdown https://kramdown.gettalong.org/syntax.html#reference-links

[Zearin]

Whoops. That’s what I get for renaming the branch! (I’ll reopen shortly.)

@plaindocs I’ve looked at the Kramdown reference you linked. I couldn’t see anything that indicated reference-style links would not work. Stumped, I checked the preview you linked… and the links are all working for me. Can you double-check the links in the preview?

[plaindocs]

Hey Zearin, yeah you're right, ref styles does work in Kramdown. Not sure what was going on first time I looked.

Merging in.

[plaindocs]

Ooh, my mistake. I'll merge into master.