From 2a2bd19a747820cd94a91a5d66bbaf0de1cabc03 Mon Sep 17 00:00:00 2001
From: Misha Brukman <mbrukman@google.com>
Date: Fri, 10 Apr 2026 19:16:37 -0400
Subject: [PATCH] Fix type warning for invalid escape in string

This change will fix the following type checker warning:

```
mobly/controllers/attenuator_lib/telnet_scpi_client.py:73: SyntaxWarning: invalid escape sequence '\S'
  [_ascii_string("\S+" + self.rx_cmd_separator)], 1
```
---
 mobly/controllers/attenuator_lib/telnet_scpi_client.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mobly/controllers/attenuator_lib/telnet_scpi_client.py b/mobly/controllers/attenuator_lib/telnet_scpi_client.py
index 98ccccab6..b43f9e7fb 100644
--- a/mobly/controllers/attenuator_lib/telnet_scpi_client.py
+++ b/mobly/controllers/attenuator_lib/telnet_scpi_client.py
@@ -70,7 +70,7 @@ def cmd(self, cmd_str, wait_ret=True):
       return None
 
     match_idx, match_val, ret_text = self._tn.expect(
-        [_ascii_string("\S+" + self.rx_cmd_separator)], 1
+        [_ascii_string(r"\S+" + self.rx_cmd_separator)], 1
     )
 
     if match_idx == -1: