expanded macros in parser?

Hi devs, I just stumbled across commit 37d64a5, which (among other things) expands all the LL/L1/etc macros in Parser.y.pp and makes the go-to file Parser.y. Why was this done? I don't love macros, but I think the old format was easier to look at and edit. I know I missed the train a bit on this by not noticing D411, but this surprised me today. Thanks, Richard