Branch merge
diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst
index acf5763..c61fedb 100644
--- a/Doc/library/sys.rst
+++ b/Doc/library/sys.rst
@@ -450,6 +450,29 @@
    struct sequence  :data:`sys.version_info` may be used for a more human-friendly
    encoding of the same information.
 
+   The ``hexversion`` is a 32-bit number with the following layout
+
+   +-------------------------+------------------------------------------------+
+   | bits (big endian order) | meaning                                        |
+   +=========================+================================================+
+   | :const:`1-8`            |  ``PY_MAJOR_VERSION``  (the ``2`` in           |
+   |                         |  ``2.1.0a3``)                                  |
+   +-------------------------+------------------------------------------------+
+   | :const:`9-16`           |  ``PY_MINOR_VERSION``  (the ``1`` in           |
+   |                         |  ``2.1.0a3``)                                  |
+   +-------------------------+------------------------------------------------+
+   | :const:`17-24`          |  ``PY_MICRO_VERSION``  (the ``0`` in           |
+   |                         |  ``2.1.0a3``)                                  |
+   +-------------------------+------------------------------------------------+
+   | :const:`25-28`          |  ``PY_RELEASE_LEVEL``  (``0xA`` for alpha,     |
+   |                         |  ``0xB`` for beta, ``0xC`` for gamma and       |
+   |                         |  ``0xF`` for final)                            |
+   +-------------------------+------------------------------------------------+
+   | :const:`29-32`          |  ``PY_RELEASE_SERIAL``  (the ``3`` in          |
+   |                         |  ``2.1.0a3``)                                  |
+   +-------------------------+------------------------------------------------+
+
+   thus ``2.1.0a3`` is hexversion ``0x020100a3``
 
 .. data:: int_info
 
diff --git a/Lib/getpass.py b/Lib/getpass.py
index ce04566..dc02bd1 100644
--- a/Lib/getpass.py
+++ b/Lib/getpass.py
@@ -62,7 +62,7 @@
         try:
             old = termios.tcgetattr(fd)     # a copy to save
             new = old[:]
-            new[3] &= ~(termios.ECHO|termios.ISIG)  # 3 == 'lflags'
+            new[3] &= ~termios.ECHO  # 3 == 'lflags'
             tcsetattr_flags = termios.TCSAFLUSH
             if hasattr(termios, 'TCSASOFT'):
                 tcsetattr_flags |= termios.TCSASOFT
diff --git a/Lib/test/test_bytes.py b/Lib/test/test_bytes.py
index a607bef..a1e08cc 100644
--- a/Lib/test/test_bytes.py
+++ b/Lib/test/test_bytes.py
@@ -290,6 +290,14 @@
         self.assertTrue(b.startswith(b"h"))
         self.assertFalse(b.startswith(b"hellow"))
         self.assertFalse(b.startswith(b"ha"))
+        try:
+            b.startswith([b'h'])
+        except TypeError as err:
+            exc = str(err)
+        else:
+            self.fail('startswith unexpectedly succeeded')
+        self.assertIn('bytes', exc)
+        self.assertIn('tuple', exc)
 
     def test_endswith(self):
         b = self.type2test(b'hello')
@@ -299,6 +307,14 @@
         self.assertTrue(b.endswith(b"o"))
         self.assertFalse(b.endswith(b"whello"))
         self.assertFalse(b.endswith(b"no"))
+        try:
+            b.endswith([b'o'])
+        except TypeError as err:
+            exc = str(err)
+        else:
+            self.fail('endswith unexpectedly succeeded')
+        self.assertIn('bytes', exc)
+        self.assertIn('tuple', exc)
 
     def test_find(self):
         b = self.type2test(b'mississippi')
diff --git a/Lib/test/test_unicode.py b/Lib/test/test_unicode.py
index 4793707..772ea35 100644
--- a/Lib/test/test_unicode.py
+++ b/Lib/test/test_unicode.py
@@ -789,6 +789,17 @@
         self.assertEqual('%f' % INF, 'inf')
         self.assertEqual('%F' % INF, 'INF')
 
+    def test_startswith_endswith_errors(self):
+        for meth in ('foo'.startswith, 'foo'.endswith):
+            try:
+                meth(['f'])
+            except TypeError as err:
+                exc = str(err)
+            else:
+                self.fail('starts/endswith unexpectedly succeeded')
+            self.assertIn('str', exc)
+            self.assertIn('tuple', exc)
+
     @support.run_with_locale('LC_ALL', 'de_DE', 'fr_FR')
     def test_format_float(self):
         # should not format with a comma, but always with C locale
diff --git a/Lib/test/test_unittest.py b/Lib/test/test_unittest.py
index 21e0806..c4cad83 100644
--- a/Lib/test/test_unittest.py
+++ b/Lib/test/test_unittest.py
@@ -2719,6 +2719,41 @@
             # no fair testing ourself with ourself, use assertEqual..
             self.assertEqual(sample_text_error, str(e))
 
+    def testAssertEqual_diffThreshold(self):
+        # check threshold value
+        self.assertEqual(self._diffThreshold, 2**16)
+        # disable madDiff to get diff markers
+        self.maxDiff = None
+
+        # set a lower threshold value and add a cleanup to restore it
+        old_threshold = self._diffThreshold
+        self._diffThreshold = 2**8
+        self.addCleanup(lambda: setattr(self, '_diffThreshold', old_threshold))
+
+        # under the threshold: diff marker (^) in error message
+        s = 'x' * (2**7)
+        try:
+            self.assertMultiLineEqual(s + 'a', s + 'b')
+        except self.failureException as exc:
+            err_msg = str(exc)
+        else:
+            self.fail('assertEqual unexpectedly succeeded')
+        self.assertIn('^', err_msg)
+        self.assertMultiLineEqual(s + 'a', s + 'a')
+
+        # over the threshold: diff not used and marker (^) not in error message
+        s = 'x' * (2**9)
+        s1, s2 = s + 'a', s + 'b'
+        try:
+            self.assertMultiLineEqual(s1, s2)
+        except self.failureException as exc:
+            err_msg = str(exc)
+        else:
+            self.fail('assertEqual unexpectedly succeeded')
+        self.assertNotIn('^', err_msg)
+        self.assertEqual(err_msg, '%r != %r' % (s1, s2))
+        self.assertMultiLineEqual(s + 'a', s + 'a')
+
     def testAssertIsNone(self):
         self.assertIsNone(None)
         self.assertRaises(self.failureException, self.assertIsNone, False)
diff --git a/Lib/unittest.py b/Lib/unittest.py
index 03a11b7..cabd857 100644
--- a/Lib/unittest.py
+++ b/Lib/unittest.py
@@ -346,6 +346,9 @@
 
     longMessage = False
 
+    # If a string is longer than _diffThreshold, use normal comparison instead
+    # of difflib.  See #11763.
+    _diffThreshold = 2**16
 
     def __init__(self, methodName='runTest'):
         """Create an instance of the class that will use the named test
@@ -955,6 +958,10 @@
                 'Second argument is not a string'))
 
         if first != second:
+            # don't use difflib if the strings are too long
+            if (len(first) > self._diffThreshold or
+                len(second) > self._diffThreshold):
+                self._baseAssertEqual(first, second, msg)
             standardMsg = '\n' + ''.join(difflib.ndiff(first.splitlines(True), second.splitlines(True)))
             self.fail(self._formatMessage(msg, standardMsg))
 
diff --git a/Misc/ACKS b/Misc/ACKS
index 6a4fdd5..75ad0f9 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -411,6 +411,7 @@
 Lucas de Jonge
 John Jorgensen
 Jens B. Jorgensen
+Sijin Joseph
 Andreas Jung
 Tattoo Mabonzo K.
 Bob Kahn
@@ -794,6 +795,7 @@
 Steven Taschuk
 Monty Taylor
 Amy Taylor
+Mikhail Terekhov
 Tobias Thelen
 James Thomas
 Robin Thomas
diff --git a/Misc/NEWS b/Misc/NEWS
index 663846f..b4ba3b6 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,9 @@
 Core and Builtins
 -----------------
 
+- Issue #6780: fix starts/endswith error message to mention that tuples are
+  accepted too.
+
 - Issue #5057: fix a bug in the peepholer that led to non-portable pyc files
   between narrow and wide builds while optimizing BINARY_SUBSCR on non-BMP
   chars (e.g. "\U00012345"[0]).
@@ -58,6 +61,11 @@
 Library
 -------
 
+- Issue #11763: don't use difflib in TestCase.assertMultiLineEqual if the
+  strings are too long.
+
+- Issue #11236: getpass.getpass responds to ctrl-c or ctrl-z on terminal.
+
 - Issue #11768: The signal handler of the signal module only calls
   Py_AddPendingCall() for the first signal to fix a deadlock on reentrant or
   parallel calls. PyErr_SetInterrupt() writes also into the wake up file.
diff --git a/Objects/bytearrayobject.c b/Objects/bytearrayobject.c
index 6fc229d..27affb5 100644
--- a/Objects/bytearrayobject.c
+++ b/Objects/bytearrayobject.c
@@ -1281,7 +1281,7 @@
 Return True if B starts with the specified prefix, False otherwise.\n\
 With optional start, test B beginning at that position.\n\
 With optional end, stop comparing B at that position.\n\
-prefix can also be a tuple of strings to try.");
+prefix can also be a tuple of bytes to try.");
 
 static PyObject *
 bytearray_startswith(PyByteArrayObject *self, PyObject *args)
@@ -1308,8 +1308,12 @@
         Py_RETURN_FALSE;
     }
     result = _bytearray_tailmatch(self, subobj, start, end, -1);
-    if (result == -1)
+    if (result == -1) {
+        if (PyErr_ExceptionMatches(PyExc_TypeError))
+            PyErr_Format(PyExc_TypeError, "startswith first arg must be bytes "
+                         "or a tuple of bytes, not %s", Py_TYPE(subobj)->tp_name);
         return NULL;
+    }
     else
         return PyBool_FromLong(result);
 }
@@ -1320,7 +1324,7 @@
 Return True if B ends with the specified suffix, False otherwise.\n\
 With optional start, test B beginning at that position.\n\
 With optional end, stop comparing B at that position.\n\
-suffix can also be a tuple of strings to try.");
+suffix can also be a tuple of bytes to try.");
 
 static PyObject *
 bytearray_endswith(PyByteArrayObject *self, PyObject *args)
@@ -1347,8 +1351,12 @@
         Py_RETURN_FALSE;
     }
     result = _bytearray_tailmatch(self, subobj, start, end, +1);
-    if (result == -1)
+    if (result == -1) {
+        if (PyErr_ExceptionMatches(PyExc_TypeError))
+            PyErr_Format(PyExc_TypeError, "endswith first arg must be bytes or "
+                         "a tuple of bytes, not %s", Py_TYPE(subobj)->tp_name);
         return NULL;
+    }
     else
         return PyBool_FromLong(result);
 }
diff --git a/Objects/bytesobject.c b/Objects/bytesobject.c
index 616f390..f2ee131 100644
--- a/Objects/bytesobject.c
+++ b/Objects/bytesobject.c
@@ -2654,8 +2654,12 @@
         Py_RETURN_FALSE;
     }
     result = _bytes_tailmatch(self, subobj, start, end, -1);
-    if (result == -1)
+    if (result == -1) {
+        if (PyErr_ExceptionMatches(PyExc_TypeError))
+            PyErr_Format(PyExc_TypeError, "startswith first arg must be bytes "
+                         "or a tuple of bytes, not %s", Py_TYPE(subobj)->tp_name);
         return NULL;
+    }
     else
         return PyBool_FromLong(result);
 }
@@ -2694,8 +2698,12 @@
         Py_RETURN_FALSE;
     }
     result = _bytes_tailmatch(self, subobj, start, end, +1);
-    if (result == -1)
+    if (result == -1) {
+        if (PyErr_ExceptionMatches(PyExc_TypeError))
+            PyErr_Format(PyExc_TypeError, "endswith first arg must be bytes or "
+                         "a tuple of bytes, not %s", Py_TYPE(subobj)->tp_name);
         return NULL;
+    }
     else
         return PyBool_FromLong(result);
 }
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 877640d..2cdbc0e 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -1554,7 +1554,7 @@
         arg = PyUnicode_FromObject(arg);
         if (!arg)
             return 0;
-        output = PyUnicode_AsEncodedObject(arg, 
+        output = PyUnicode_AsEncodedObject(arg,
                                            Py_FileSystemDefaultEncoding,
                                            "surrogateescape");
         Py_DECREF(arg);
@@ -1569,7 +1569,7 @@
     if (PyBytes_Check(output)) {
          size = PyBytes_GET_SIZE(output);
          data = PyBytes_AS_STRING(output);
-    } 
+    }
     else {
          size = PyByteArray_GET_SIZE(output);
          data = PyByteArray_AS_STRING(output);
@@ -2148,7 +2148,7 @@
        illegal prefix.  See RFC 3629 for details */
     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 00-0F */
     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
@@ -2631,7 +2631,7 @@
 #endif
     PyObject *errorHandler = NULL;
     PyObject *exc = NULL;
-    
+
     q = (unsigned char *)s;
     e = q + size;
 
@@ -8743,8 +8743,12 @@
         Py_RETURN_FALSE;
     }
     substring = (PyUnicodeObject *)PyUnicode_FromObject(subobj);
-    if (substring == NULL)
+    if (substring == NULL) {
+        if (PyErr_ExceptionMatches(PyExc_TypeError))
+            PyErr_Format(PyExc_TypeError, "startswith first arg must be str or "
+                         "a tuple of str, not %s", Py_TYPE(subobj)->tp_name);
         return NULL;
+    }
     result = tailmatch(self, substring, start, end, -1);
     Py_DECREF(substring);
     return PyBool_FromLong(result);
@@ -8787,9 +8791,12 @@
         Py_RETURN_FALSE;
     }
     substring = (PyUnicodeObject *)PyUnicode_FromObject(subobj);
-    if (substring == NULL)
+    if (substring == NULL) {
+        if (PyErr_ExceptionMatches(PyExc_TypeError))
+            PyErr_Format(PyExc_TypeError, "endswith first arg must be str or "
+                         "a tuple of str, not %s", Py_TYPE(subobj)->tp_name);
         return NULL;
-
+    }
     result = tailmatch(self, substring, start, end, +1);
     Py_DECREF(substring);
     return PyBool_FromLong(result);
diff --git a/Tools/pybench/pybench.py b/Tools/pybench/pybench.py
index bee0e56..9f1e2e4 100755
--- a/Tools/pybench/pybench.py
+++ b/Tools/pybench/pybench.py
@@ -276,7 +276,7 @@
             for i in calibration_loops:
                 pass
             t = timer() - t
-            prep_times.append(t)
+            prep_times.append(t / CALIBRATION_LOOPS)
         min_prep_time = min(prep_times)
         if _debug:
             print()