Lint/LiteralInInterpolation incorrectly flags interpolation of backticks

[aevernon]

Steps to Reproduce

$ echo 'puts "Backticks #{`date`}"' > foo.rb
$ rubocop foo.rb 

Observed Behavior

foo.rb:1:19: W: Literal interpolation detected.
puts "Backticks #{`date`}"'
                  ^^^^^^

Expected Behavior

Interpolation of dynamic string literals should be allowed.

Environment

$ rubocop -V
0.36.0 (using Parser 2.3.0.1, running on ruby 2.2.4 x86_64-linux)

[segiddins]

The cop failing is actually Lint/LiteralInInterpolation.