Fix revealjs title author ORCID spacing

[jnkatz]

Summary

Fixes revealjs fancy title slides so authors without ORCID IDs do not render a trailing space after the author name.

The title slide partial had a literal separator space before the optional ORCID block. When by-author.orcid was unset, that separator remained as trailing whitespace in the generated author-name block. This moves the separator inside the ORCID conditional so it is only emitted when the ORCID link is emitted.

Validation

• Added a revealjs fixture without an ORCID ID.
• Added a smoke-test assertion that the generated author name is followed directly by </div> and does not contain trailing horizontal whitespace before that closing tag.
• Ran git diff --check.
• Ran ./configure.sh successfully after allowing Deno network access outside the local sandbox.
• Ran DENO_DIR=aarch64 QUARTO_TESTS_NO_CONFIG=true QUARTO_TESTS_FORCE_NO_VENV=true ./run-tests.sh smoke/render/render-reveal.test.ts.

The new title-fancy-author.qmd regression test passed. Three existing tests in the same file failed in this local checkout because the fresh R test environment did not have knitr/rmarkdown installed; those failures were unrelated to this title-slide change.

• Also rendered the new fixture directly with the dev Quarto build and verified Jonathan N. Katz is followed by a newline and </div>, with no trailing horizontal whitespace.

[cderv]

Thank you for the report !

This is indeed a space not correctly placed. I'll handle it from here - we prefer to have smoke-all test now , and we need changelog.