fixed linting errors and added name in contributors

Author: Navjot Singh

bson/__init__.py

@@ -1009,7 +1009,7 @@ def _dict_to_bson(
                 try:
                     elements.append(_element_to_bson(key, value, check_keys, opts))
                 except InvalidDocument as err:
-                    raise InvalidDocument("Invalid document {} | {}".format(doc,err)) from err
+                    raise InvalidDocument(f"Invalid document {doc} | {err}") from err
     except AttributeError:
         raise TypeError(f"encoder expected a mapping type but got: {doc!r}") from None
 

doc/contributors.rst

@@ -102,3 +102,4 @@ The following is a list of people who have contributed to
 - Ivan Lukyanchikov (ilukyanchikov)
 - Terry Patterson
 - Romain Morotti
+- Navjot Singh (navjots18)

test/test_bson.py

@@ -1001,7 +1001,6 @@ def __repr__(self):
             encode({"t": Wrapper(1)})
 
     def test_doc_in_invalid_document_error_message(self):
-
         class Wrapper:
             def __init__(self, val):
                 self.val = val
@@ -1011,9 +1010,7 @@ def __repr__(self):
 
         self.assertEqual("1", repr(Wrapper(1)))
         doc = {"t": Wrapper(1)}
-        with self.assertRaisesRegex(
-            InvalidDocument, "Invalid document {}".format(doc)
-        ):
+        with self.assertRaisesRegex(InvalidDocument, f"Invalid document {doc}"):
             encode(doc)