Corrected 2 blank lines after class

To fix linter

src/nidm/experiment/tools/nidm_query.py

@@ -309,6 +309,7 @@ def query(
         os.system("pynidm query --help")
         sys.exit(1)
 
+
 # it can be used calling the script `python nidm_query.py -nl ... -q ..
 if __name__ == "__main__":
     query()