prometheus / prometheus/OpenMetrics

irregular syntax in content type

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@ywwg is already working on this.

Since Oct 1, 2025.

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Description

Follow up from https://github.com/prometheus/client_java/issues/865#issue-1905280216

If I see that correctly a syntax like version=1.0.0 is not valid as . it not allowed as an unquoted parameter value - that is not correct in the spec https://github.com/OpenObservability/OpenMetrics/blob/main/specification/OpenMetrics.md#overall-structure. The correct version should be version="1.0.0".

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