tc: fix flake8 issues

  pytest_mh/utils/tc.py:88:90: E226 missing whitespace around arithmetic operator
  pytest_mh/utils/tc.py:123:84: E226 missing whitespace around arithmetic operator

Author: pbrezina

pytest_mh/utils/tc.py

@@ -85,7 +85,7 @@ def add_delay(self, hostname: str, time: str | int):
         commands = "set -e\n"
         for interface in self.__interfaces:
             commands += (
-                f"tc qdisc add dev {interface} parent 1:{self.__band} handle {self.__band*10}: netem "
+                f"tc qdisc add dev {interface} parent 1:{self.__band} handle {self.__band * 10}: netem "
                 f"delay {time_unit}\n"
             )
             for ip in ip_list:
@@ -120,6 +120,6 @@ def remove_delay(self, hostname: str):
             for band in bands:
                 commands += f"tc filter del dev {interface} prio {band}\n"
 
-            commands += f"tc qdisc del dev {interface} parent 1:{band} handle {band*10}: netem\n"
+            commands += f"tc qdisc del dev {interface} parent 1:{band} handle {band * 10}: netem\n"
 
         self.host.ssh.run(commands, log_level=SSHLog.Error)