"Previews available in:" sometimes displayed without any preview languages

[jimchamp]

Sometimes the "Previews available in:" copy is rendered without any preview languages.

Evidence / Screenshot (if possible)

Relevant url?

https://openlibrary.org/works/OL4472450W/Shad?edition=ia%3Ashad0000corr

Steps to Reproduce

1. Go to the page listed above.
2. Observe the "Previews available in:" section in the overview.

• Actual: No languages are listed.
• Expected: Links to previews in specific languages should be displayed.

Details

• Logged in (Y/N)? N
• Browser type/version? N/A
• Operating system? N/A
• Environment (prod/dev/local)? prod

Proposal & Constraints

Do not display "Previews available in:" if there are no previews.

Related files

Code related to this is found here:

openlibrary/openlibrary/templates/type/edition/view.html

Lines 267 to 275 in 46bcf7c

	$ seen = set()
	$if previews:
	<p class="preview-languages">
	Previews available in:
	$for e in previews:
	$if e.languages[0].name not in seen:
	$ seen.add(e.languages[0].name)
	<a href="$work.key?edition=$(e.ocaid)">$e.languages[0].name</a>
	</p>

Stakeholders