fix: Refactor run_interactive_command function to use UTF-8 encoding

aider/utils.py

@@ -30,37 +30,7 @@ def run_interactive_command(command):
 
     try:
         # Spawn the command
-        child = pexpect.spawn(command, encoding=None)
+        child = pexpect.spawn(command, encoding="utf-8")
-
-        # Transfer control to the user, capturing output
-        child.interact(output_filter=output_callback)
-
-        # Wait for the command to finish and get the exit status
-        child.close()
-        return child.exitstatus, output.getvalue().decode("utf-8", errors="replace")
-
-    except pexpect.ExceptionPexpect as e:
-        error_msg = f"Error running command: {e}"
-        print(error_msg, file=sys.stderr)
-        return 1, error_msg
-
-
-def run_interactive_command(command):
-    """
-    Run a shell command interactively using pexpect, capturing all output.
-
-    :param command: The command to run as a string.
-    :return: A tuple containing (exit_status, output)
-    """
-    output = BytesIO()
-
-    def output_callback(b):
-        output.write(b)
-        return b
-
-    try:
-        # Spawn the command
-        child = pexpect.spawn(command, encoding=None)
 
         # Transfer control to the user, capturing output
         child.interact(output_filter=output_callback)