Term name includes plural taxonomy name as prefix

[jasonccox]

When a taxonomy name includes a space, its terms which only have a single associated page have the plural taxonomy name prepended to their name when rendering.

This bug appears to have been introduced in #13064.

Setup

hugo.toml:

[taxonomies]
"book author" = "book authors"

content/posts/post1.md:

---
title: My Post
tags: ["Tag One"]
book authors: ["Author One"]
---

content/posts/post2.md:

---
title: My Post
tags: ["Tag One", "Tag Two"]
book authors: ["Author One", "Author Two"]
---

layouts/_default/taxonomy.html

{{ range .Data.Terms.ByCount }}
Term: {{ .Term }}
Count: {{ .Count }}
Name: {{ .Name }}
Page title: {{ .Page.Title }}

{{ end }}

Expected output in public/book-authors/index.html

Term: author one
Count: 2
Name: author one
Page title: Author One

Term: author two
Count: 1
Name: author two
Page title: Author Two

Actual output in public/book-authors/index.html

Term: author one
Count: 2
Name: author one
Page title: Author One

Term: book authors/author two
Count: 1
Name: book authors/author two
Page title: Book Authors/Author Two

What version of Hugo are you using (hugo version)?

$ hugo version
hugo v0.144.2+extended+withdeploy linux/amd64 BuildDate=unknown

Does this issue reproduce with the latest release?

Yes