EmptyConditionalBody autocorrect can result in breaking logic changes

[CvX]

Looking at EmptyConditionalBody spec, some autocorrect scenarios (in expect_correction blocks) actually result in logic-breaking changes. For example:

rubocop/spec/rubocop/cop/lint/empty_conditional_body_spec.rb

Lines 115 to 133 in 3f24b82

	it 'registers an offense for missing `elsif` body' do
	expect_offense(<<~RUBY)
	if condition
	do_something1
	elsif other_condition1
	^^^^^^^^^^^^^^^^^^^^^^ Avoid `elsif` branches without a body.
	elsif other_condition2
	do_something2
	end
	RUBY
	expect_correction(<<~RUBY)
	if condition
	do_something1
	elsif other_condition2
	do_something2
	end
	RUBY
	end

To make it clearer here's the same case but with more real-world-y variable names:

# before
if show_version
  puts VERSION
elsif dry_run
elsif delete_files
  `rm -rf *`
end

# after
if show_version
  puts VERSION
elsif delete_files
  `rm -rf *`
end

After an autocorrect run, dry_run flag is no longer used which is a breaking change.

RuboCop version

1.60.2 (using Parser 3.3.0.5, rubocop-ast 1.30.0, running on ruby 3.2.1) [arm64-darwin22]
/the latest on the main branch

[vlad-pisanov]

The autocorrect is already marked as unsafe, but it could be improved to replace internal elsif branch bodies with nil, as opposed to removing them.

if show_version
  puts VERSION
elsif dry_run # internal branch, replace with `nil`
  nil
elsif delete_files
  `rm -rf *`
end