bpo-44544: add textwrap placeholder arg (GH-27671)

(cherry picked from commit cb7874f49d3d55df73a3c529773af14e2e344fb7)

Co-authored-by: andrei kulakov <andrei.avk@gmail.com>
diff --git a/Doc/library/textwrap.rst b/Doc/library/textwrap.rst
index 7780e24..1a9d5f9 100644
--- a/Doc/library/textwrap.rst
+++ b/Doc/library/textwrap.rst
@@ -21,7 +21,8 @@
                    subsequent_indent="", expand_tabs=True, \
                    replace_whitespace=True, fix_sentence_endings=False, \
                    break_long_words=True, drop_whitespace=True, \
-                   break_on_hyphens=True, tabsize=8, max_lines=None)
+                   break_on_hyphens=True, tabsize=8, max_lines=None, \
+                   placeholder=' [...]')
 
    Wraps the single paragraph in *text* (a string) so every line is at most
    *width* characters long.  Returns a list of output lines, without final
@@ -39,7 +40,7 @@
                    replace_whitespace=True, fix_sentence_endings=False, \
                    break_long_words=True, drop_whitespace=True, \
                    break_on_hyphens=True, tabsize=8, \
-                   max_lines=None)
+                   max_lines=None, placeholder=' [...]')
 
    Wraps the single paragraph in *text*, and returns a single string containing the
    wrapped paragraph.  :func:`fill` is shorthand for  ::