Update test_initial.py - linting line 878

Signed-off-by: Jim-smith <jim-smith@users.noreply.github.com>

test/test_initial.py

@@ -875,7 +875,7 @@ def test_crosstab_multiple_aggregate_function(data, acro):
     assert (
         output.summary == correct_summary
     ), f"\n{output.summary}\n should be \n{correct_summary}\n"
-    print(f"{output.output[0]['mean'][ 'R/G'].sum()}")
+    print(f"{output.output[0]['mean']['R/G'].sum()}")
     correctval = 97383496.0
     errmsg = f"{output.output[0]['mean']['R/G'].sum()} should be {correctval}"
     assert correctval == output.output[0]["mean"]["R/G"].sum(), errmsg