Update src/tm_devices/drivers/pi/scopes/tekscope_2k/tekscope_2k.py

Co-authored-by: Nicholas Felt <[email protected]>
Signed-off-by: Joe <[email protected]>

src/tm_devices/drivers/pi/scopes/tekscope_2k/tekscope_2k.py

@@ -42,7 +42,7 @@ def get_available_data_sources(self) -> List[str]:
         previous_header_state = self.query("HEADER?").split(" ")[-1]  # Read previous header state
         self.write("HEADER 1")  # Turn on header state so SELECT query works correctly
         source_string = self.query("SELECT?")
-        self.write("HEADER" + previous_header_state)  # Return header state back to original
+        self.write(f"HEADER {previous_header_state}")  # Return header state back to original
 
         source_string = source_string.split(":")[-1]  # Remove :SELECT: from beginning
         source_list = source_string.split(";")