Fix test_display_error vsock test

Error string changed. Adapt to new string

Signed-off-by: Jonathan Woollett-Light <[email protected]>
Co-authored-by: Babis Chalios <[email protected]>

Author: JonathanWoollett-Light

src/devices/src/virtio/vsock/csm/mod.rs

@@ -152,21 +152,14 @@ mod tests {
         );
 
         assert_eq!(
-            format!(
-                "{}",
-                Error::TxBufFlush(std::io::Error::from(std::io::ErrorKind::Other))
-            ),
-            "An I/O error occurred, when attempting to flush the connection TX buffer: other os \
-             error"
+            Error::TxBufFlush(std::io::Error::from(std::io::ErrorKind::Other)).to_string(),
+            "An I/O error occurred, when attempting to flush the connection TX buffer: other error"
         );
 
         assert_eq!(
-            format!(
-                "{}",
-                Error::StreamWrite(std::io::Error::from(std::io::ErrorKind::Other))
-            ),
+            Error::StreamWrite(std::io::Error::from(std::io::ErrorKind::Other)).to_string(),
             "An I/O error occurred, when attempting to write data to the host-side stream: other \
-             os error"
+             error"
         );
     }
 }