Fix genTL log message spacing and tidy test

Adjust Harvester.update() error log string concatenation in gentl_backend.py to ensure proper spaces between message parts. Also remove an extraneous comment line from the gentl backend test to clean up test output.

Author: C-Achard

dlclivegui/cameras/backends/gentl_backend.py

@@ -399,9 +399,9 @@ def _build_harvester_for_discovery(
             harvester.update()
         except Exception as exc:
             LOG.error(
-                "Harvester.update() failed during discovery: %s "
-                "Device list not usable, treating as discovery failure."
-                "CTIs loaded before failure : %s",
+                "Harvester.update() failed during discovery: %s"
+                " Device list not usable, treating as discovery failure."
+                " CTIs loaded before failure : %s",
                 exc,
                 loaded,
             )

tests/cameras/backends/test_gentl_backend.py

@@ -708,7 +708,6 @@ def test_open_persists_cti_load_diagnostics_all_success(patch_gentl_sdk, gentl_s
     ns = settings.properties["gentl"]
     assert ns["cti_files"] == [str(c1), str(c2)]
     assert ns["cti_files_loaded"] == [str(c1), str(c2)]
-    # If dict:
     assert ns["cti_files_failed"] == []
 
     be.close()