Invalid auto-correct on negated if with parentheses

[ebastien]

The code "0 if (!a)" is corrected to "0 if a":

if.rb:1:1: C: [Corrected] Favor if over unless for negative conditions.
0 unless !a
^^^^^^^^^^^
if.rb:1:1: C: [Corrected] Favor unless over if for negative conditions.
0 if (!a)
^^^^^^^^^
if.rb:1:6: C: [Corrected] Don't use parentheses around the condition of an if.
0 if (!a)
     ^^^^

I am running RuboCop 0.21.0

[bbatsov]

@jonas054 Would you have a look at this?

[jonas054]

Yes.