Yarn: LoopingStream -> MultiUseStream

[Marcono1234]

The name came from https://github.com/FabricMC/yarn/pull/338#discussion_r242899941

The comment is correctly describing the functionality, the class allows using a stream multiple times. But in my opinion the current name "LoopingStream" suggests that the stream continues at the beginning once it reached the end.

A name like "MultiUseStream" might fit better. Similarly the method getStream should be named newStream to indicate that a new stream and not an existing one is returned.

The fields could use the following names:

Obfuscated | Deobfuscated
--- | ---
a | collectedElements
b | delegate / source

And if it is possible to name the field of the anonymous class, then it could be named index / currentIndex.

[JamiesWhiteShirt]

I would suggest ReusableStream.