[erlang-questions] Did Erlang's grammar change in R16A?

[Richard A. O'Keefe]

I had always assumed that dots, like at-signs, were allowed in
Erlang atoms so that one could write an Erlang node name like
erl_node@REDACTED as an atom. 

It was never clearly stated anywhere what the rules were, and
the way that .x = x was particularly odd.