NettyVarint21FrameEncoder exception message is incomplete

The bug

The exception thrown by the method net.minecraft.network.Varint21LengthFieldPrepender.encode(ChannelHandlerContext, ByteBuf, ByteBuf) (20w07a Mojang name) when it tries to encode a buffer whose length cannot be stored using 3 bytes is created with an incomplete message.

unable to fit 2232077 into 3

"unable to fit " + i + " into " + 3

Suggested would for example be

"Cannot write buffer length of " + i + " using " + 3 + " bytes"