format fix

Author: DenisBiryukov91

tests/examples_check.py

@@ -363,7 +363,7 @@ def test_z_advanced_pub_z_advanced_sub():
     ## Run z_advanced_pub and z_advanced_sub
     ## z_advanced_pub: Start publishing messages
     pub = Pyrun("z_advanced_pub.py", ["--history=10"])
-    time.sleep(5) # wait 5 seconds to ensure that we miss few messages
+    time.sleep(5)  # wait 5 seconds to ensure that we miss few messages
     sub = Pyrun("z_advanced_sub.py", [])
     time.sleep(5)
 
@@ -377,10 +377,12 @@ def test_z_advanced_pub_z_advanced_sub():
     sub_out = "".join(sub.stdout)
     for i in range(0, 8):
         if not (
-            F"Received SampleKind.PUT ('demo/example/zenoh-python-pub': '[   {i}] Pub from Python!')"
+            f"Received SampleKind.PUT ('demo/example/zenoh-python-pub': '[   {i}] Pub from Python!')"
             in sub_out
         ):
-            sub.errors.append(F"z_advanced_sub didn't catch the {i}-th z_advanced_pub message")
+            sub.errors.append(
+                f"z_advanced_sub didn't catch the {i}-th z_advanced_pub message"
+            )
 
     assert not pub.errors
-    assert not sub.errors
+    assert not sub.errors