<ref name="a">book</ref> <ref extends="a">page 2</ref> <ref extends="a">page 2</ref>
is currently rendered as:
That's not wrong, but: Users expect these two identical sub-references to be merged, because this is how top-level references also behave.
Change 556381 had a related patch set uploaded (by Thiemo Kreuz (WMDE); owner: Thiemo Kreuz (WMDE)):
[mediawiki/extensions/Cite@master] Add parser test for duplicate extended references
Change 556381 merged by jenkins-bot:
[mediawiki/extensions/Cite@master] Add parser test for duplicate extended references
this is how top-level references also behave
Doesn't seem to be the case. Top-level (or any other) references are only collapsed together when they are named, both have the same name, and the content is identical. It sounds like a nice feature, but would be entirely new.
Here's the syntax which matches the current feature, and it already does work correctly for subreferences. I think we should close this task.
<ref name="a">book</ref> <ref name="b" extends="a">page 2</ref> <ref name="b" extends="a">page 2</ref>
Change 562860 had a related patch set uploaded (by Awight; owner: Awight):
[mediawiki/extensions/Cite@master] Remove invalid test case
Change 562860 merged by jenkins-bot:
[mediawiki/extensions/Cite@master] Remove invalid test case