Missing toString override in GlobalProperties$Keys causes incorrectly named Keys due to string concatenation with existing Keys

[DJtheRedstoner]

The lack of a toString override in GlobalProperties$Keys makes the following code (and other similar instances) create a key similar to org.spongepowered.asm.launch.GlobalProperties$Keys@239b0f9d.default.

Mixin/src/main/java/org/spongepowered/asm/mixin/MixinEnvironment.java

Line 1096 in 155314e

this.configsKey = Keys.of(GlobalProperties.Keys.CONFIGS + "." + this.phase.name.toLowerCase(Locale.ROOT));

[Mumfrey]

Thanks for opening this, marked as bug.