rubocop: fix offences of the Lint/UnderscorePrefixedVariableName cop

.rubocop_todo.yml

@@ -18,10 +18,6 @@ Lint/ShadowedException:
   Exclude:
     - 'lib/pry/method.rb'
 
-# Offense count: 32
-Lint/UnderscorePrefixedVariableName:
-  Enabled: false
-
 # Offense count: 1
 # Configuration parameters: CheckForMethodsWithNoSideEffects.
 Lint/Void:

lib/pry/commands/hist.rb

@@ -143,10 +143,10 @@ class Pry
       def check_for_juxtaposed_replay(replay_sequence)
         if replay_sequence =~ /\Ahist(?:ory)?\b/
           # Create *fresh* instance of Options for parsing of "hist" command.
-          _slop = slop
-          _slop.parse replay_sequence.split(' ')[1..-1]
+          slop_instance = slop
+          slop_instance.parse(replay_sequence.split(' ')[1..-1])
 
-          if _slop.present?(:r)
+          if slop_instance.present?(:r)
             replay_sequence = replay_sequence.split("\n").join('; ')
             index = opts[:r]
             index = index.min if index.min == index.max || index.max.nil?

lib/pry/repl_file_loader.rb

@@ -34,8 +34,8 @@ class Pry
     # @param [Pry] pry_instance the Pry instance to make non-interactive.
     def non_interactive_mode(pry_instance, content)
       pry_instance.print = proc {}
-      pry_instance.exception_handler = proc do |o, _e, _p_|
-        _p_.run_command "cat --ex"
+      pry_instance.exception_handler = proc do |o, _e, p|
+        p.run_command "cat --ex"
         o.puts "...exception encountered, going interactive!"
         interactive_mode(pry_instance)
       end

spec/pry_spec.rb

@@ -437,10 +437,10 @@ describe Pry do
 
       describe "Pry.binding_for" do
         it 'should return TOPLEVEL_BINDING if parameter self is main' do
-          _main_ = -> { TOPLEVEL_BINDING.eval('self') }
-          expect(Pry.binding_for(_main_.call).is_a?(Binding)).to eq true
-          expect(Pry.binding_for(_main_.call)).to eq TOPLEVEL_BINDING
-          expect(Pry.binding_for(_main_.call)).to eq Pry.binding_for(_main_.call)
+          main = -> { TOPLEVEL_BINDING.eval('self') }
+          expect(Pry.binding_for(main.call).is_a?(Binding)).to eq true
+          expect(Pry.binding_for(main.call)).to eq TOPLEVEL_BINDING
+          expect(Pry.binding_for(main.call)).to eq Pry.binding_for(main.call)
         end
       end
     end