[ruby/irb] Centralize rstrip calls

(https://github.com/ruby/irb/pull/918)

https://github.com/ruby/irb/commit/97898b6251

lib/irb/command/backtrace.rb

@@ -8,7 +8,7 @@ module IRB
   module Command
     class Backtrace < DebugCommand
       def execute(arg)
-        execute_debug_command(pre_cmds: "backtrace #{arg}".rstrip)
+        execute_debug_command(pre_cmds: "backtrace #{arg}")
       end
     end
   end

lib/irb/command/break.rb

@@ -8,7 +8,7 @@ module IRB
   module Command
     class Break < DebugCommand
       def execute(arg)
-        execute_debug_command(pre_cmds: "break #{arg}".rstrip)
+        execute_debug_command(pre_cmds: "break #{arg}")
       end
     end
   end

lib/irb/command/catch.rb

@@ -8,7 +8,7 @@ module IRB
   module Command
     class Catch < DebugCommand
       def execute(arg)
-        execute_debug_command(pre_cmds: "catch #{arg}".rstrip)
+        execute_debug_command(pre_cmds: "catch #{arg}")
       end
     end
   end

lib/irb/command/continue.rb

@@ -8,7 +8,7 @@ module IRB
   module Command
     class Continue < DebugCommand
       def execute(arg)
-        execute_debug_command(do_cmds: "continue #{arg}".rstrip)
+        execute_debug_command(do_cmds: "continue #{arg}")
       end
     end
   end

lib/irb/command/debug.rb

@@ -18,6 +18,9 @@ module IRB
       end
 
       def execute_debug_command(pre_cmds: nil, do_cmds: nil)
+        pre_cmds = pre_cmds&.rstrip
+        do_cmds = do_cmds&.rstrip
+
         if irb_context.with_debugger
           # If IRB is already running with a debug session, throw the command and IRB.debug_readline will pass it to the debugger.
           if cmd = pre_cmds || do_cmds

lib/irb/command/delete.rb

@@ -8,7 +8,7 @@ module IRB
   module Command
     class Delete < DebugCommand
       def execute(arg)
-        execute_debug_command(pre_cmds: "delete #{arg}".rstrip)
+        execute_debug_command(pre_cmds: "delete #{arg}")
       end
     end
   end

lib/irb/command/finish.rb

@@ -8,7 +8,7 @@ module IRB
   module Command
     class Finish < DebugCommand
       def execute(arg)
-        execute_debug_command(do_cmds: "finish #{arg}".rstrip)
+        execute_debug_command(do_cmds: "finish #{arg}")
       end
     end
   end

lib/irb/command/info.rb

@@ -8,7 +8,7 @@ module IRB
   module Command
     class Info < DebugCommand
       def execute(arg)
-        execute_debug_command(pre_cmds: "info #{arg}".rstrip)
+        execute_debug_command(pre_cmds: "info #{arg}")
       end
     end
   end

lib/irb/command/next.rb

@@ -8,7 +8,7 @@ module IRB
   module Command
     class Next < DebugCommand
       def execute(arg)
-        execute_debug_command(do_cmds: "next #{arg}".rstrip)
+        execute_debug_command(do_cmds: "next #{arg}")
       end
     end
   end

lib/irb/command/step.rb

@@ -8,7 +8,7 @@ module IRB
   module Command
     class Step < DebugCommand
       def execute(arg)
-        execute_debug_command(do_cmds: "step #{arg}".rstrip)
+        execute_debug_command(do_cmds: "step #{arg}")
       end
     end
   end