diff --git a/Lib/_MozillaCookieJar.py b/Lib/_MozillaCookieJar.py
index 4fd6de3..00e8bcf 100644
--- a/Lib/_MozillaCookieJar.py
+++ b/Lib/_MozillaCookieJar.py
@@ -38,9 +38,9 @@
     """
     magic_re = "#( Netscape)? HTTP Cookie File"
     header = """\
-    # Netscape HTTP Cookie File
-    # http://www.netscape.com/newsref/std/cookie_spec.html
-    # This is a generated file!  Do not edit.
+# Netscape HTTP Cookie File
+# http://www.netscape.com/newsref/std/cookie_spec.html
+# This is a generated file!  Do not edit.
 
 """
 
diff --git a/Lib/imaplib.py b/Lib/imaplib.py
index d1f62b0..8734a84 100644
--- a/Lib/imaplib.py
+++ b/Lib/imaplib.py
@@ -751,7 +751,7 @@
                               ', '.join(Commands[command])))
         name = 'UID'
         typ, dat = self._simple_command(name, command, *args)
-        if command in ('SEARCH', 'SORT'):
+        if command in ('SEARCH', 'SORT', 'THREAD'):
             name = command
         else:
             name = 'FETCH'
diff --git a/Lib/pydoc.py b/Lib/pydoc.py
index 4d60436..0798406 100755
--- a/Lib/pydoc.py
+++ b/Lib/pydoc.py
@@ -1705,9 +1705,12 @@
         'CONTEXTMANAGERS': ('context-managers', 'with'),
     }
 
-    def __init__(self, input, output):
-        self.input = input
-        self.output = output
+    def __init__(self, input=None, output=None):
+        self._input = input
+        self._output = output
+
+    input  = property(lambda self: self._input or sys.stdin)
+    output = property(lambda self: self._output or sys.stdout)
 
     def __repr__(self):
         if inspect.stack()[1][3] == '?':
@@ -1884,7 +1887,7 @@
 for modules whose descriptions contain the word "spam".
 ''')
 
-help = Helper(sys.stdin, sys.stdout)
+help = Helper()
 
 class Scanner:
     """A generic tree iterator."""