Fix lints from recent PR (#248)

src/query.rs

@@ -1,5 +1,7 @@
 use crate::{make_term, Schema};
-use pyo3::{exceptions, prelude::*, types::PyAny, types::PyString, types::PyTuple};
+use pyo3::{
+    exceptions, prelude::*, types::PyAny, types::PyString, types::PyTuple,
+};
 use tantivy as tv;
 
 /// Custom Tuple struct to represent a pair of Occur and Query
@@ -16,7 +18,6 @@ impl <'source> FromPyObject<'source> for OccurQueryPair {
     }
 }
 
-
 /// Tantivy's Occur
 #[pyclass(frozen, module = "tantivy.tantivy")]
 #[derive(Clone)]
@@ -137,7 +138,7 @@ impl Query {
     #[staticmethod]
     #[pyo3(signature = (subqueries))]
     pub(crate) fn boolean_query(
-        subqueries: Vec<(Occur, Query)>
+        subqueries: Vec<(Occur, Query)>,
     ) -> PyResult<Query> {
         let dyn_subqueries = subqueries
             .into_iter()