diff --git a/lib/irb/command/backtrace.rb b/lib/irb/command/backtrace.rb
index 610f9ee22..687bb075a 100644
--- a/lib/irb/command/backtrace.rb
+++ b/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
diff --git a/lib/irb/command/break.rb b/lib/irb/command/break.rb
index 42ee002ce..a8f81fe66 100644
--- a/lib/irb/command/break.rb
+++ b/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
diff --git a/lib/irb/command/catch.rb b/lib/irb/command/catch.rb
index 655c77d8a..529dcbca5 100644
--- a/lib/irb/command/catch.rb
+++ b/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
diff --git a/lib/irb/command/continue.rb b/lib/irb/command/continue.rb
index 49e4384eb..0daa029b1 100644
--- a/lib/irb/command/continue.rb
+++ b/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
diff --git a/lib/irb/command/debug.rb b/lib/irb/command/debug.rb
index aeafe19b5..f9aca0a67 100644
--- a/lib/irb/command/debug.rb
+++ b/lib/irb/command/debug.rb
@@ -18,6 +18,9 @@ def execute(_arg)
       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
diff --git a/lib/irb/command/delete.rb b/lib/irb/command/delete.rb
index 4b45a51e7..2a57a4a3d 100644
--- a/lib/irb/command/delete.rb
+++ b/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
diff --git a/lib/irb/command/finish.rb b/lib/irb/command/finish.rb
index c1d62357f..3311a0e6e 100644
--- a/lib/irb/command/finish.rb
+++ b/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
diff --git a/lib/irb/command/info.rb b/lib/irb/command/info.rb
index 897ee2c43..d08ce00a3 100644
--- a/lib/irb/command/info.rb
+++ b/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
diff --git a/lib/irb/command/next.rb b/lib/irb/command/next.rb
index 92d28e33e..3fc6b68d2 100644
--- a/lib/irb/command/next.rb
+++ b/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
diff --git a/lib/irb/command/step.rb b/lib/irb/command/step.rb
index 514981302..29e5e35ac 100644
--- a/lib/irb/command/step.rb
+++ b/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