[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

dpdata/plugins/lammps.py

@@ -108,9 +108,7 @@ def from_system(
         register_charge(data)
         return data
 
-    def to_system(
-        self, data, file_name: FileType, frame_idx=0, **kwargs
-    ):
+    def to_system(self, data, file_name: FileType, frame_idx=0, **kwargs):
         """Dump the system in lammps data format.
 
         Parameters