Fix bundled gems warning for all subfeatures of hyphenated gems - #15908

Summary

Follow-up to #15822 - fix incorrect warning for subfeatures of hyphenated gems like benchmark/timing when benchmark-ips is in the Gemfile. I've only checked loading ips, but wasn't enough 😅

Problem

After #15822, users still get warnings when using gems like benchmark-ips:

$ bundle exec ruby -v script.rb
ruby 4.0.1 (2026-01-13 revision e04267a14b) +PRISM [x86_64-linux]
benchmark/timing is found in benchmark, which is not part of the default gems since Ruby 4.0.0.

This happens because benchmark-ips provides multiple files:

• benchmark/ips.rb
• benchmark/timing.rb
• benchmark/compare.rb

The fix in #15822 only checks for exact hyphenated match (benchmark/timing → benchmark-timing), but benchmark-timing gem doesn't exist.

Solution

Instead of checking for exact hyphenated gem name, check if ANY gem matching {prefix}-* is in the bundle specs:

# Before: only checks for benchmark-timing (doesn't exist)
hyphenated_gem = "#{feature_parts[0]}-#{feature_parts[1]}"
return if specs.include?(hyphenated_gem)

# After: checks for any benchmark-* gem (finds benchmark-ips)
prefix = feature.split("/").first + "-"
return if specs.any? { |spec, _| spec.start_with?(prefix) }

Test

Added test case for benchmark/timing and benchmark/compare with benchmark-ips in specs.