SyntaxError after "safe" correction into end-less method definition

[paddor]

rubocop -a turns one-line method definitions into syntactically incorrect end-less method definitions on Ruby 3.0.

Example:

      def sndhwm() Zsock.sndhwm(@zocket) end

---

Expected behavior

Correct syntax:

      def sndhwm = Zsock.sndhwm(@zocket)

Actual behavior

      def sndhwm(()) = Zsock.sndhwm(@zocket)

RuboCop version

1.8.0 (using Parser 3.0.0.0, rubocop-ast 1.4.0, running on ruby 3.0.0 x86_64-linux)

Ruby version

ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [x86_64-linux]

[dvandersluis]

I'll take a look at this.