tidy: is_whitespace() already covers newline, remove redundant arm

hive-c0re/src/matrix.rs

@@ -390,7 +390,7 @@ fn extract_new_password(bot_message: &str) -> Option<String> {
             let rest = rest.trim_start();
             // Stop at first whitespace or newline; password must be non-empty.
             let end = rest
-                .find(|c: char| c.is_whitespace() || c == '\n')
+                .find(char::is_whitespace)
                 .unwrap_or(rest.len());
             let pw = rest[..end].trim();
             if !pw.is_empty() {