Address review: remove issue URL from docstring, add newline test

Per @picnixz's review:
- Remove issue URL from bow_ws() docstring (keep reference in tests only)
- Add period to issue reference comment in test
- Add test_bow_ws_with_newlines to cover newline as whitespace boundary

Author: kimimgo

Lib/_pyrepl/reader.py

@@ -423,7 +423,6 @@ def bow_ws(self, p: int | None = None) -> int:
 
         p defaults to self.pos; only whitespace is considered a word
         boundary, matching the behavior of unix-word-rubout in bash/readline.
-        See https://github.com/python/cpython/issues/146044
         """
         if p is None:
             p = self.pos

Lib/test/test_pyrepl/test_reader.py

@@ -359,7 +359,7 @@ def test_setpos_from_xy_for_non_printing_char(self):
         self.assertEqual(reader.pos, 7)
 
     def test_bow_ws_stops_at_whitespace(self):
-        # See https://github.com/python/cpython/issues/146044
+        # See https://github.com/python/cpython/issues/146044.
         reader = prepare_reader(prepare_console([]))
         reader.buffer = list("foo.bar baz")
         reader.pos = len(reader.buffer)
@@ -386,6 +386,12 @@ def test_bow_ws_with_tabs(self):
         reader.pos = len(reader.buffer)
         self.assertEqual(reader.bow_ws(), 4)
 
+    def test_bow_ws_with_newlines(self):
+        reader = prepare_reader(prepare_console([]))
+        reader.buffer = list("foo\nbar")
+        reader.pos = len(reader.buffer)
+        self.assertEqual(reader.bow_ws(), 4)
+
 @force_colorized_test_class
 class TestReaderInColor(ScreenEqualMixin, TestCase):
     def test_syntax_highlighting_basic(self):