typos in documentation

Author: arbesulo

README.md

@@ -535,7 +535,7 @@ The `<...>` notation means the argument.
 * `q[uit]!`
   * Same as q[uit] but without the confirmation prompt.
 * `kill`
-  * Stop the debuggee process with `Kernal#exit!`.
+  * Stop the debuggee process with `Kernel#exit!`.
 * `kill!`
   * Same as kill but without the confirmation prompt.
 * `sigint`

lib/debug/session.rb

@@ -454,7 +454,7 @@ def process_command line
         leave_subsession nil
 
       # * `kill`
-      #   * Stop the debuggee process with `Kernal#exit!`.
+      #   * Stop the debuggee process with `Kernel#exit!`.
       when 'kill'
         if ask 'Really kill?'
           exit! (arg || 1).to_i