With Hugo v0.88.1 and earlier, ContentBaseName and TranslationBaseName
both returned "index" when creating a leaf bundle with hugo new. This is
a known bug, addressed with https://github.com/gohugoio/hugo/pull/9045.
With this PR:
hugo new post/my-first-post/index.md
will produce:
title: "My First Post"
instead of:
title: "Index"