Invalid html from _repr_html_() #955
Description
When viewing the html generated by the _repr_html() method of a Collection or Catalog (e.g., in a notebook or browser), there are missing Target fields in some of the links. This appears to be due to invalid html. For example, something like this in a notebook...
import pystac
pystac.Collection.from_file("data-files/catalogs/test-case-1/country-1/area-1-1/collection.json")...will be missing some Link Target values:
Looking at the html for that first circled link...
<table style="width: 100%; text-align: left;">
<tr><td style="text-align: left;"><strong>Rel:</strong> root </td></tr>
<tr><td style="text-align: left;"><strong>Target:</strong> <Catalog id=test> </td></tr>
<tr><td style="text-align: left;"><strong>Media Type:</strong> application/json </td></tr>
</table>
...the problem seems to be the invalid tag: <Catalog id=test>. I think the link address should replace the tag.
There are a few other minor items that could be included in a fix for this issue
- Not all field titles, e.g., the Collection
IDin the example above, are in bold font. - Might be worth adding
<!DOCTYPE html>and enclosing the content in<html></html>tags.