Update readme for the 'debugger' statement

Author: st0012

README.md

@@ -60,8 +60,14 @@ There are several options for (1) and (2). Please choose your favorite way.
 
 ### Modify source code with [`binding.break`](#bindingbreak-method) (similar to `binding.pry` or `binding.irb`)
 
-If you can modify the source code, you can use the debugger by adding `require 'debug'` line at the top of your program and putting [`binding.break`](#bindingbreak-method) method (`binding.b` for short) into lines where you want to stop as breakpoints like `binding.pry` and `binding.irb`.
-After that, you run the program as usual and you will enter the debug console at breakpoints you inserted.
+If you can modify the source code, you can use the debugger by adding `require 'debug'` at the top of your program and putting [`binding.break`](#bindingbreak-method) method into lines where you want to stop as breakpoints like `binding.pry` and `binding.irb`.
+
+You can also use its 2 aliases in the same way:
+
+- `binding.b`
+- `debugger`
+
+After that, run the program as usual and you will enter the debug console at breakpoints you inserted.
 
 The following example shows the demonstration of [`binding.break`](#bindingbreak-method).
 

misc/README.md.erb

@@ -60,8 +60,14 @@ There are several options for (1) and (2). Please choose your favorite way.
 
 ### Modify source code with [`binding.break`](#bindingbreak-method) (similar to `binding.pry` or `binding.irb`)
 
-If you can modify the source code, you can use the debugger by adding `require 'debug'` line at the top of your program and putting [`binding.break`](#bindingbreak-method) method (`binding.b` for short) into lines where you want to stop as breakpoints like `binding.pry` and `binding.irb`.
-After that, you run the program as usual and you will enter the debug console at breakpoints you inserted.
+If you can modify the source code, you can use the debugger by adding `require 'debug'` at the top of your program and putting [`binding.break`](#bindingbreak-method) method into lines where you want to stop as breakpoints like `binding.pry` and `binding.irb`.
+
+You can also use its 2 aliases in the same way:
+
+- `binding.b`
+- `debugger`
+
+After that, run the program as usual and you will enter the debug console at breakpoints you inserted.
 
 The following example shows the demonstration of [`binding.break`](#bindingbreak-method).