/usr/lib/ruby/vendor_ruby/pry/commands/ls/ is in pry 0.10.3-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/pry/commands/ls/constants.rb
/usr/lib/ruby/vendor_ruby/pry/commands/ls/formatter.rb
/usr/lib/ruby/vendor_ruby/pry/commands/ls/globals.rb
/usr/lib/ruby/vendor_ruby/pry/commands/ls/grep.rb
/usr/lib/ruby/vendor_ruby/pry/commands/ls/instance_vars.rb
/usr/lib/ruby/vendor_ruby/pry/commands/ls/interrogatable.rb
/usr/lib/ruby/vendor_ruby/pry/commands/ls/jruby_hacks.rb
/usr/lib/ruby/vendor_ruby/pry/commands/ls/local_names.rb
/usr/lib/ruby/vendor_ruby/pry/commands/ls/local_vars.rb
/usr/lib/ruby/vendor_ruby/pry/commands/ls/ls_entity.rb
/usr/lib/ruby/vendor_ruby/pry/commands/ls/methods.rb
/usr/lib/ruby/vendor_ruby/pry/commands/ls/methods_helper.rb
/usr/lib/ruby/vendor_ruby/pry/commands/ls/self_methods.rb