Kill buffer, not kill ring?

[BurdetteLamar]

Is it true that Reline has only a single kill buffer, and not a kill ring?

I find that C-y yanks the same text over and over (as expected), while I have not been able to get M-y to work at all.

[rubyFeedback]

I can not answer the question, but I think this would be useful to have it documented - e. g. API level for more technical contributors.

I rarely use C-y or M-y. Actually, I think I never used or seen M-y. Are there examples of other implementations that use these two combinations? The most often one I use is C-c (Ctrl-c).

Actually there are many things I'd like to know about Reline. But some of this is IRB related as the new IRB confuses me a little. I think zenspider also expressed some frustration about this in the past, though perhaps more with regard to bugs than missing documentation.