format name/value with YAML syntax

[matbonfanti]

This PR fixes the incorrect formatting of the params file generated by the nf-core pipelines create-params-file command (issue #3441). The output written with the name = value format has been corrected to name: value.

PR checklist

• This comment contains a description of changes (with reason)
• CHANGELOG.md is updated
• If you've fixed a bug or added code that should be tested, add tests!
• Documentation in docs is updated

[mashehu]

Nice!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.32%. Comparing base (639e419) to head (02dcbb7).
Report is 4 commits behind head on dev.

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[matbonfanti]

@mashehu, if you think that all is fine with the code changes, can you please merge the PR?

[mashehu]

I added you to the nf-core org, so you should have rights to merge the PR yourself and don't need to wait on me 🙂

[matbonfanti]

awesome! thanks!