RFR: CSR JDK-8233385 Align some one-way conversion in MS950 charset with Windows

[Ichiroh Takiguchi]

Hello.

Could you review CSR JDK-8233385 [1] ?

[1] https://bugs.openjdk.java.net/browse/JDK-8233385

Thanks,
Ichiroh Takiguchi
IBM Japan, Ltd.