The issue: Using integer as tags (e.g. 2025) is supported by hugo, but printf here converts it to `sint2025`.
An easy client-side solution would be to add quotes to the tag `"2025"`, but it's not intuitive.
Instead, we let hugo choose how to do the conversion.
Working tags:
- `NoSpace` => `tags/nospace/`
- `Two Words` => `tags/two-words/`
- `2025` => `tags/2025/`
- `2025.1` => `tags/2025.1/`
- `1/2` => `tags/1/2/`
- `✔️` => `tags/%EF%B8%8F/`
Breaking change:
- `1\2` => `tags/1/2` but was and should be `tags/1\2` (or `tags/1%5C2`)
IMO we can ignore this case, which can produce other weird behaviours
fbad744c03