Fix the default placeholder in textwrap.shorten() to be " [...]".
For some reason I forgot to do it before committing the patch in issue #18585.
diff --git a/Lib/textwrap.py b/Lib/textwrap.py
index b19f124..27ebc16 100644
--- a/Lib/textwrap.py
+++ b/Lib/textwrap.py
@@ -19,7 +19,7 @@
 # since 0xa0 is not in range(128).
 _whitespace = '\t\n\x0b\x0c\r '
 
-_default_placeholder = ' (...)'
+_default_placeholder = ' [...]'
 
 class TextWrapper:
     """
@@ -376,7 +376,7 @@
         >>> textwrap.shorten("Hello  world!", width=12)
         'Hello world!'
         >>> textwrap.shorten("Hello  world!", width=11)
-        'Hello (...)'
+        'Hello [...]'
     """
     w = TextWrapper(width=width, **kwargs)
     return w.shorten(text, placeholder=placeholder)