base: Replace newlines when reading secret from file

mira/base.py

@@ -49,7 +49,7 @@ class MiraBot:
             self._password = self._config["password"]
         else if "password_file" in self._config:
             with open(self._config["password_file"], "r") as f:
-                self._password = f.read()
+                self._password = f.read().replace("\n", "")
         else:
             raise Exception("Neither password nor password_file specified")