Make Lint/Debugger aware of debug.rb

This PR makes `Lint/Debugger` aware of debug.rb.
https://github.com/ruby/debug

debug.rb has `binding.break` and `binding.b` commands (`b` for short).

changelog/new_make_lint_debugger_aware_of_debug_rb.md

@@ -0,0 +1 @@
+* [#10040](https://github.com/rubocop/rubocop/pull/10040): Make `Lint/Debugger` aware of debug.rb. ([@koic][])

config/default.yml

@@ -1519,6 +1519,11 @@ Lint/Debugger:
     Capybara:
       - save_and_open_page
       - save_and_open_screenshot
+    debug.rb:
+      - binding.b
+      - binding.break
+      - Kernel.binding.b
+      - Kernel.binding.break
     Pry:
       - binding.pry
       - binding.remote_pry

lib/rubocop/cop/lint/debugger.rb

@@ -7,8 +7,8 @@ module Lint
       # not be kept for production code.
       #
       # The cop can be configured using `DebuggerMethods`. By default, a number of gems
-      # debug entrypoints are configured (`Kernel`, `Byebug`, `Capybara`, `Pry`, `Rails`,
-      # `RubyJard` and `WebConsole`). Additional methods can be added.
+      # debug entrypoints are configured (`Kernel`, `Byebug`, `Capybara`, `debug.rb`,
+      # `Pry`, `Rails`, `RubyJard`, and `WebConsole`). Additional methods can be added.
       #
       # Specific default groups can be disabled if necessary:
       #

spec/rubocop/cop/lint/debugger_spec.rb

@@ -114,6 +114,36 @@
     end
   end
 
+  context 'debug.rb' do
+    it 'registers an offense for a `b` binding call' do
+      expect_offense(<<~RUBY)
+        binding.b
+        ^^^^^^^^^ Remove debugger entry point `binding.b`.
+      RUBY
+    end
+
+    it 'registers an offense for a `break` binding call' do
+      expect_offense(<<~RUBY)
+        binding.break
+        ^^^^^^^^^^^^^ Remove debugger entry point `binding.break`.
+      RUBY
+    end
+
+    it 'registers an offense for a `binding.b` with `Kernel` call' do
+      expect_offense(<<~RUBY)
+        Kernel.binding.b
+        ^^^^^^^^^^^^^^^^ Remove debugger entry point `Kernel.binding.b`.
+      RUBY
+    end
+
+    it 'registers an offense for a `binding.break` with `Kernel` call' do
+      expect_offense(<<~RUBY)
+        Kernel.binding.break
+        ^^^^^^^^^^^^^^^^^^^^ Remove debugger entry point `Kernel.binding.break`.
+      RUBY
+    end
+  end
+
   context 'pry' do
     it 'registers an offense for a pry binding call' do
       expect_offense(<<~RUBY)