Replace the esoteric '<<' in calls to Buffer.BlockCopy() in URI.cs (#37310)
Replace the esoteric '<<' in calls to Buffer.BlockCopy() in URI.cs (#37310)

* Document the esoteric use of '<<' in URI.cs

* Fix comment style

* Make calls to Buffer.BlockCopy() clearer

* Add EOL

wtgodbe/corefx,ericstj/corefx,wtgodbe/corefx,ericstj/corefx,ericstj/corefx,ericstj/corefx,ericstj/corefx,shimingsg/corefx,shimingsg/corefx,ViktorHofer/corefx,BrennanConroy/corefx,wtgodbe/corefx,ViktorHofer/corefx,ViktorHofer/corefx,shimingsg/corefx,shimingsg/corefx,BrennanConroy/corefx,BrennanConroy/corefx,ericstj/corefx,ViktorHofer/corefx,shimingsg/corefx,ViktorHofer/corefx,wtgodbe/corefx,ViktorHofer/corefx,wtgodbe/corefx,ericstj/corefx,wtgodbe/corefx,ViktorHofer/corefx,shimingsg/corefx,shimingsg/corefx,wtgodbe/corefx