fixed bug

app/logger.py

@@ -7,7 +7,7 @@ _console_lock = threading.Lock()
 def _log(prefix: str, message: str) -> None:
     time = utils.format_datetime("%H:%M:%S")
     with _console_lock:
-        print(f"[{time}] {prefix} {message}")
+        print(f"[{time}] {prefix}: {message}")
 
 def info(message: str) -> None:
     _log("INFO", message)
@@ -17,4 +17,4 @@ def warning(message: str) -> None:
 
 def error(message: str) -> None:
     _log("ERROR", message)
-    sys.exit(1)
+    sys.exit(1)