RFR: 8264999: GeneralPath.lineTo() to itself produces jagged lines

[Jeremy]

On Mon, 30 May 2022 01:15:01 GMT, Jeremy <duke at openjdk.java.net> wrote:

> Previously when you drew a line that moved exactly (+0, +0) with a miter stroke the Stroker class acted like a horizontal miter was appropriate. Now we abort instead, so no miter is applied.
> 
> The new unit test tests the original steps plus several variations.
> 
> I'm a little nervous about this change because it looks like someone previously considered this exact condition and implemented a different behavior. I don't think I understand the original rationale.

@bourgesl as the (or one of the?) resident Marlin experts: what do you think of this approach and the accompanying unit test?

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PR: https://git.openjdk.java.net/jdk/pull/8943