Incorrect auto-correct Lint/LiteralInInterpolation if contains numbers

[david942j]

Hi rubocop teams,
I found rubocop incorrectly fixes the LiteralInInterpolation.

This bug causes the Ruby program behave different between before/after being fixed by rubocop's auto-correct.

---

Expected behavior

$ cat a.rb
# puts "Hey, #{0x20}"
$ rubocop a.rb -a
<output omitted>
$ cat a.rb
# puts 'Hey, 32'

Actual behavior

$ cat a.rb
# puts "Hey, #{0x20}"
$ rubocop a.rb -a
<output omitted>
$ cat a.rb
# puts 'Hey, 0x20'   <----- incorrect!

Invoke rubocop without auto-correct, it shows:

Inspecting 1 file
W

Offenses:

a.rb:1:14: W: Lint/LiteralInInterpolation: Literal interpolation detected.
puts "Hey, #{0x20}"
             ^^^^

1 file inspected, 1 offense detected

Steps to reproduce the problem

Prepare a.rb:

puts "Hey, #{0x20}"

then

$ rubocop -a a.rb

RuboCop version

Include the output of rubocop -V. Here's an example:

$ rubocop -V
0.55.0 (using Parser 2.5.1.0, running on ruby 2.4.3 x86_64-linux)

[koic]

Thanks for the feedback. I confirmed this reproduction. I opened a PR #5863.