Fix type warning for invalid escape in string (#1003)

mbrukman · web-flow · commit b37ad6aa8a66 · 2026-04-13T09:33:39.000-07:00
Fixes 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
```
diff --git 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:

Original file line number	Diff line number	Diff line change
`@@ -70,7 +70,7 @@ def cmd(self, cmd_str, wait_ret=True):`
`70`	`70`	`return None`
`71`	`71`
`72`	`72`	`match_idx, match_val, ret_text = self._tn.expect(`
`73`		`- [_ascii_string("\S+" + self.rx_cmd_separator)], 1`
	`73`	`+ [_ascii_string(r"\S+" + self.rx_cmd_separator)], 1`
`74`	`74`	`)`
`75`	`75`
`76`	`76`	`if match_idx == -1:`