Extension-free URLs don't resolve as per the document
Documented behavior
https://docs.gitlab.com/ee/user/project/pages/introduction.html#resolving-ambiguous-urls
public/
├─┬ index.html
│ ├ data.html
│ └ info.html
│
├── data/
│ └── index.html
├── info/
│ └── details.html
└── other/
└── index.html| URL path | HTTP response | File served |
|---|---|---|
| /data | 200 OK | public/data/index.html |
| /data/ | 200 OK | public/data/index.html |
| /data.html | 200 OK | public/data.html |
Actual behavior
| URL path | HTTP response | File served |
|---|---|---|
| /data | 302 to /data/ | public/data/index.html |
So, this is affecting SEO and clean URL
Expected behavior
As per the documented behavior, as that's clean and similar to GitHub