rubocop: fix offences of the Style/NumericLiteralPrefix cop

.rubocop_todo.yml

@@ -305,16 +305,6 @@ Style/MultipleComparison:
   Exclude:
     - 'lib/pry/indent.rb'
 
-# Offense count: 5
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedOctalStyle.
-# SupportedOctalStyles: zero_with_o, zero_only
-Style/NumericLiteralPrefix:
-  Exclude:
-    - 'lib/pry/history.rb'
-    - 'spec/history_spec.rb'
-    - 'spec/pryrc_spec.rb'
-
 # Offense count: 24
 # Cop supports --auto-correct.
 Style/ParallelAssignment:

lib/pry/history.rb

@@ -111,7 +111,7 @@ class Pry
         @history_file
       else
         FileUtils.mkdir_p(File.dirname(history_file_path)) unless File.exist?(history_file_path)
-        @history_file = File.open(history_file_path, 'a', 0600).tap do |file|
+        @history_file = File.open(history_file_path, 'a', 0o600).tap do |file|
           file.sync = true
         end
       end

spec/history_spec.rb

@@ -147,7 +147,7 @@ describe Pry do
       error = Class.new(RuntimeError)
 
       expect(File).to receive(:open)
-        .with(File.join(ENV['HOME'].to_s, "/test_history"), 'a', 0600)
+        .with(File.join(ENV['HOME'].to_s, "/test_history"), 'a', 0o600)
         .and_raise(error)
 
       expect { history.push 'a line' }.to raise_error error
@@ -167,7 +167,7 @@ describe Pry do
 
       it "handles #{error_class} failure to write history" do
         Pry.config.history.should_save = true
-        expect(File).to receive(:open).with(file_path, "a", 0600).and_raise(error_class)
+        expect(File).to receive(:open).with(file_path, "a", 0o600).and_raise(error_class)
         expect(history).to receive(:warn).with(/Unable to write history file:/)
         expect { history.push("anything") }.to_not raise_error
       end

spec/pryrc_spec.rb

@@ -36,11 +36,11 @@ describe Pry do
 
     it "should not load the pryrc if pryrc's directory permissions do not allow this" do
       Dir.mktmpdir do |dir|
-        File.chmod 0000, dir
+        File.chmod 0o000, dir
         Pry::LOCAL_RC_FILE.replace File.join(dir, '.pryrc')
         Pry.config.should_load_rc = true
         expect { Pry.start(self, input: StringIO.new("exit-all\n"), output: StringIO.new) }.to_not raise_error
-        File.chmod 0777, dir
+        File.chmod 0o777, dir
       end
     end