Ielm vs. ":"
I can no longer use ielm in b50.
Ielm uses the symbols `:', `::', and `:::' to refer to the results of
the previous, second previous and third previous evaluations
respectively.
However in b50, doing (setq : nil) results in
Attempt to set a constant symbol: :, nil
Similarly for :: and :::. In fact, (boundp '::::::::::::::::)
evaluates "t" for an arbitrarily long string of colons. Why?
It's been several betas since I tested ielm, but it used to work.