[Lint/NumericOperationWithConstantResult] incorrectly mistakes format string evaluations as numerical operations

[postmodern]

Recently rubocop 1.69.1 flagged an RSpec test which tested the output of a format string (ex: %.2x). However, rubocop mistook the format string evaluation using String#% as a numerical operation.

[Correctable] Lint/NumericOperationWithConstantResult: Numeric operation with a constant result detected.
            number_format % 0x01,
            ^^^^^^^^^^^^^^^^^^^^

Apparently, rubocop is smart enough to detect when a local variable was previously defined and that it is a String. However, in this context number_format was defined dynamically using RSpec's let().

---

Expected behavior

Ignore number_format; possibly because the variable name contains format or fmt?

Actual behavior

For /data/home/postmodern/code/ronin-rb/ronin-support: configuration from /data/home/postmodern/code/ronin-rb/ronin-support/.rubocop.yml
Inheriting configuration from /data/home/postmodern/code/ronin-rb/vendor/bundle/ruby/3.3.0/gems/rubocop-ronin-0.2.7/rubocop.yml
Default configuration from /data/home/postmodern/code/ronin-rb/vendor/bundle/ruby/3.3.0/gems/rubocop-1.69.1/config/default.yml
Use parallel by default.
Skipping parallel inspection: only a single file needs inspection
Inspecting 1 file
Scanning /data/home/postmodern/code/ronin-rb/ronin-support/spec/binary/unhexdump/parser_spec.rb
Loading cache from /home/postmodern/.cache/rubocop_cache/d5be16cfb188840558666dc46b3e0676a580509d/6d7a3b621ca1730e04accd938619e4bdab66cfb1/7e7cbcde3e0d8a0272b4d2510a07a0ba01da99ab

spec/binary/unhexdump/parser_spec.rb:320:13: W: [Correctable] Lint/NumericOperationWithConstantResult: Numeric operation with a constant result detected.
            number_format % 0x01,
            ^^^^^^^^^^^^^^^^^^^^

Steps to reproduce the problem

Gemfile:

source 'https://rubygems.org'

gem 'rubocop'

test.rb:

# frozen_string_literal: true

def fmt_string
  '%.2x'
end

fmt_string % 1

1. bundle install
2. bundle exec rubocop test.rb

RuboCop version

$ bundle exec rubocop -V
1.69.1 (using Parser 3.3.6.0, rubocop-ast 1.36.2, analyzing as Ruby 2.7, running on ruby 3.3.6) [x86_64-linux]