Remove useless newline

pre_commit_hooks/pretty_format_json.py

@@ -129,7 +129,10 @@ def main(argv=None):  # type: (Optional[Sequence[str]]) -> int
                 if args.autofix:
                     _autofix(json_file, pretty_contents)
                 else:
-                    print(get_diff(contents, pretty_contents, json_file))
+                    print(
+                        get_diff(contents, pretty_contents, json_file),
+                        end='',
+                    )
 
                 status = 1
         except ValueError:

tests/pretty_format_json_test.py

@@ -130,7 +130,6 @@ def test_diffing_output(capsys):
 +  "blah": null,
 +  "foo": "bar"
  }}
-
 '''.format(a, b)
     expected_err = 'File {} is not pretty-formatted\n'.format(resource_path)