flynt pass to provide consistency to string formatters and concatenation

providers/sigrefdata/sig_ref_data_provider.py

@@ -38,7 +38,7 @@ class SIGRefDataProvider:
         # with transact() batches all writes together to save making thousands of individual sqlite writes
         with DATA_STORE.sigrefs.transact():
             for d in new_data:
-                DATA_STORE.sigrefs.set(self.sig_name + ":" + d.id, d)
+                DATA_STORE.sigrefs.set(f"{self.sig_name}:{d.id}", d)
 
                 # For the big data sources, loading will take a few minutes. If we want to shut down the software neatly
                 # within the first few minutes of startup, we need a way to abort this expensive process of filling up the