fix(row276): correct multi-file driver path per mos-1337 review

agents/gander/work/queue-276/driver.py

@@ -87,7 +87,7 @@ def main():
             (args.out/'results.json').write_text(json.dumps(results,indent=2)+'\n')
             if base['code'] != 0 or base['seconds'] > 30:
                 raise RuntimeError('base failed or exceeded 30 seconds: '+d['id'])
-        originals = {REPO[file]: (REPO/file).read_bytes() for file in [d['file'], *d.get('also_files', [])]}
+        originals = {REPO/file: (REPO/file).read_bytes() for file in [d['file'], *d.get('also_files', [])]}
         try:
             for target, original in originals.items():
                 target.write_bytes(original.replace(d['old'].encode(),d['new'].encode(),1))