While lilypond code (lyrics) in pages like:
https://upload.wikimedia.org/score/4/g/4g97c4ppxkkkt166s1804niezsag3ld/4g97c4pp.ly
is internally utf8-encoded, info about encoding is missing from server header:
HTTP/1.1 200 OK
Date: Sat, 24 Jul 2021 12:11:19 GMT
Content-Type: text/plain
X-Object-Meta-Sha1Base36: 0f2h91jox9pjkjvui0h0i9of54l66j0
Last-Modified: Sat, 24 Jul 2021 07:04:33 GMT
X-Timestamp: 1627110272.02985
Server: ATS/8.0.8
ETag: W/87799c3987c7ae3d900eaf0d5689b8a6
Vary: Accept-Encoding
Age: 0
X-Cache: cp1078 miss, cp1088 miss
X-Cache-Status: miss
Server-Timing: cache;desc="miss", host;desc="cp1088"
Strict-Transport-Security: max-age=106384710; includeSubDomains; preload
Report-To: { "group": "wm_nel", "max_age": 86400, "endpoints": [{ "url": "https://intake-logging.wikimedia.org/v1/events?stream=w3c.reportingapi.network_error&schema_uri=/w3c/reportingapi/network_error/1.0.0" }] }
NEL: { "report_to": "wm_nel", "max_age": 86400, "failure_fraction": 0.05, "success_fraction": 0.0}
Permissions-Policy: interest-cohort=()
X-Client-IP: <!-- redacted -->
Access-Control-Allow-Origin: *
Access-Control-Expose-Headers: Age, Date, Content-Length, Content-Range, X-Content-Duration, X-Cache
Timing-Allow-Origin: *
Accept-Ranges: bytes
Transfer-Encoding: chunked
Connection: keep-alive