diff --git a/Doc/howto/cporting.rst b/Doc/howto/cporting.rst
index 6dd0765..9d8a1b0 100644
--- a/Doc/howto/cporting.rst
+++ b/Doc/howto/cporting.rst
@@ -253,7 +253,7 @@
 
   * :c:func:`PyCapsule_GetName` always returns NULL.
 
-  * :c:func:`PyCapsule_SetName` always throws an exception and
+  * :c:func:`PyCapsule_SetName` always raises an exception and
     returns failure.  (Since there's no way to store a name
     in a CObject, noisy failure of :c:func:`PyCapsule_SetName`
     was deemed preferable to silent failure here.  If this is
diff --git a/Lib/asyncore.py b/Lib/asyncore.py
index b06077f..d379ba8 100644
--- a/Lib/asyncore.py
+++ b/Lib/asyncore.py
@@ -393,7 +393,7 @@
             else:
                 return data
         except socket.error as why:
-            # winsock sometimes throws ENOTCONN
+            # winsock sometimes raises ENOTCONN
             if why.args[0] in _DISCONNECTED:
                 self.handle_close()
                 return b''
diff --git a/Lib/distutils/tests/test_msvc9compiler.py b/Lib/distutils/tests/test_msvc9compiler.py
index 5fa1ca1..301d43d 100644
--- a/Lib/distutils/tests/test_msvc9compiler.py
+++ b/Lib/distutils/tests/test_msvc9compiler.py
@@ -104,7 +104,7 @@
                             unittest.TestCase):
 
     def test_no_compiler(self):
-        # makes sure query_vcvarsall throws
+        # makes sure query_vcvarsall raises
         # a DistutilsPlatformError if the compiler
         # is not found
         from distutils.msvc9compiler import query_vcvarsall
diff --git a/Lib/email/feedparser.py b/Lib/email/feedparser.py
index aa8a2ff..16ed288 100644
--- a/Lib/email/feedparser.py
+++ b/Lib/email/feedparser.py
@@ -13,7 +13,7 @@
 data.  When you have no more data to push into the parser, call .close().
 This completes the parsing and returns the root message object.
 
-The other advantage of this parser is that it will never throw a parsing
+The other advantage of this parser is that it will never raise a parsing
 exception.  Instead, when it finds something unexpected, it adds a 'defect' to
 the current message.  Defects are just instances that live on the message
 object's .defects attribute.
@@ -214,7 +214,7 @@
         # supposed to see in the body of the message.
         self._parse_headers(headers)
         # Headers-only parsing is a backwards compatibility hack, which was
-        # necessary in the older parser, which could throw errors.  All
+        # necessary in the older parser, which could raise errors.  All
         # remaining lines in the input are thrown into the message body.
         if self._headersonly:
             lines = []
diff --git a/Lib/email/header.py b/Lib/email/header.py
index 3250d36..e33324a 100644
--- a/Lib/email/header.py
+++ b/Lib/email/header.py
@@ -280,7 +280,7 @@
             else:
                 s = s.decode(input_charset, errors)
         # Ensure that the bytes we're storing can be decoded to the output
-        # character set, otherwise an early error is thrown.
+        # character set, otherwise an early error is raised.
         output_charset = charset.output_codec or 'us-ascii'
         if output_charset != _charset.UNKNOWN8BIT:
             try:
diff --git a/Lib/importlib/_bootstrap.py b/Lib/importlib/_bootstrap.py
index 90eb1a7..aa4032c 100644
--- a/Lib/importlib/_bootstrap.py
+++ b/Lib/importlib/_bootstrap.py
@@ -415,7 +415,7 @@
                 source_mtime is not None):
             # If e.g. Jython ever implements imp.cache_from_source to have
             # their own cached file format, this block of code will most likely
-            # throw an exception.
+            # raise an exception.
             data = bytearray(imp.get_magic())
             data.extend(marshal._w_long(source_mtime))
             data.extend(marshal.dumps(code_object))
diff --git a/Lib/importlib/test/import_/test_fromlist.py b/Lib/importlib/test/import_/test_fromlist.py
index b903e8e..7ecde03 100644
--- a/Lib/importlib/test/import_/test_fromlist.py
+++ b/Lib/importlib/test/import_/test_fromlist.py
@@ -39,7 +39,7 @@
 
     If a package is being imported, then what is listed in fromlist may be
     treated as a module to be imported [module]. But once again, even if
-    something in fromlist does not exist as a module, no error is thrown
+    something in fromlist does not exist as a module, no error is raised
     [no module]. And this extends to what is contained in __all__ when '*' is
     imported [using *]. And '*' does not need to be the only name in the
     fromlist [using * with others].
diff --git a/Lib/io.py b/Lib/io.py
index a59a75a..63d2b33 100644
--- a/Lib/io.py
+++ b/Lib/io.py
@@ -4,7 +4,7 @@
 At the top of the I/O hierarchy is the abstract base class IOBase. It
 defines the basic interface to a stream. Note, however, that there is no
 separation between reading and writing to streams; implementations are
-allowed to throw an IOError if they do not support a given operation.
+allowed to raise an IOError if they do not support a given operation.
 
 Extending IOBase is RawIOBase which deals simply with the reading and
 writing of raw bytes to a stream. FileIO subclasses RawIOBase to provide
diff --git a/Lib/logging/__init__.py b/Lib/logging/__init__.py
index 361fa88..4da07f1 100644
--- a/Lib/logging/__init__.py
+++ b/Lib/logging/__init__.py
@@ -1355,7 +1355,7 @@
         """
         sinfo = None
         if _srcfile:
-            #IronPython doesn't track Python frames, so findCaller throws an
+            #IronPython doesn't track Python frames, so findCaller raises an
             #exception on some versions of IronPython. We trap it here so that
             #IronPython can use logging.
             try:
diff --git a/Lib/multiprocessing/util.py b/Lib/multiprocessing/util.py
index 20bba37..61b0533 100644
--- a/Lib/multiprocessing/util.py
+++ b/Lib/multiprocessing/util.py
@@ -301,7 +301,7 @@
         _run_finalizers(0)
         if current_process() is not None:
             # We check if the current process is None here because if
-            # it's None, any call to ``active_children()`` will throw an
+            # it's None, any call to ``active_children()`` will raise an
             # AttributeError (active_children winds up trying to get
             # attributes from util._current_process).  This happens in a
             # variety of shutdown circumstances that are not well-understood
diff --git a/Lib/runpy.py b/Lib/runpy.py
index 7cb4668..a14a62e 100644
--- a/Lib/runpy.py
+++ b/Lib/runpy.py
@@ -211,7 +211,7 @@
                 pass
         else:
             # The following check looks a bit odd. The trick is that
-            # NullImporter throws ImportError if the supplied path is a
+            # NullImporter raises ImportError if the supplied path is a
             # *valid* directory entry (and hence able to be handled
             # by the standard import machinery)
             try:
diff --git a/Lib/tempfile.py b/Lib/tempfile.py
index 34dff30..b8fc18c 100644
--- a/Lib/tempfile.py
+++ b/Lib/tempfile.py
@@ -625,7 +625,7 @@
 
     def __init__(self, suffix="", prefix=template, dir=None):
         self._closed = False
-        self.name = None # Handle mkdtemp throwing an exception
+        self.name = None # Handle mkdtemp raising an exception
         self.name = mkdtemp(suffix, prefix, dir)
 
     def __repr__(self):
diff --git a/Lib/test/test_codeop.py b/Lib/test/test_codeop.py
index d096293..b65423b 100644
--- a/Lib/test/test_codeop.py
+++ b/Lib/test/test_codeop.py
@@ -50,7 +50,7 @@
         '''succeed iff str is the start of an invalid piece of code'''
         try:
             compile_command(str,symbol=symbol)
-            self.fail("No exception thrown for invalid code")
+            self.fail("No exception raised for invalid code")
         except SyntaxError:
             self.assertTrue(is_syntax)
         except OverflowError:
diff --git a/Lib/test/test_docxmlrpc.py b/Lib/test/test_docxmlrpc.py
index 60a69dd..d6ca458 100644
--- a/Lib/test/test_docxmlrpc.py
+++ b/Lib/test/test_docxmlrpc.py
@@ -100,7 +100,7 @@
         self.assertEqual(response.status, 200)
         self.assertEqual(response.getheader("Content-type"), "text/html")
 
-        # Server throws an exception if we don't start to read the data
+        # Server raises an exception if we don't start to read the data
         response.read()
 
     def test_invalid_get_response(self):
diff --git a/Lib/test/test_imaplib.py b/Lib/test/test_imaplib.py
index 5c99a58..43ee7df 100644
--- a/Lib/test/test_imaplib.py
+++ b/Lib/test/test_imaplib.py
@@ -99,7 +99,7 @@
                         return
                     line += part
                 except IOError:
-                    # ..but SSLSockets throw exceptions.
+                    # ..but SSLSockets raise exceptions.
                     return
                 if line.endswith(b'\r\n'):
                     break
diff --git a/Lib/test/test_minidom.py b/Lib/test/test_minidom.py
index 4a69b00..80812c8 100644
--- a/Lib/test/test_minidom.py
+++ b/Lib/test/test_minidom.py
@@ -1085,7 +1085,7 @@
         self.assertEqual(doc.toxml('iso-8859-15'),
             b'<?xml version="1.0" encoding="iso-8859-15"?><foo>\xa4</foo>')
 
-        # Verify that character decoding errors throw exceptions instead
+        # Verify that character decoding errors raise exceptions instead
         # of crashing
         self.assertRaises(UnicodeDecodeError, parseString,
                 b'<fran\xe7ais>Comment \xe7a va ? Tr\xe8s bien ?</fran\xe7ais>')
diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py
index ef14733..612c62a 100644
--- a/Lib/test/test_os.py
+++ b/Lib/test/test_os.py
@@ -164,33 +164,33 @@
 
         try:
             result[200]
-            self.fail("No exception thrown")
+            self.fail("No exception raised")
         except IndexError:
             pass
 
         # Make sure that assignment fails
         try:
             result.st_mode = 1
-            self.fail("No exception thrown")
+            self.fail("No exception raised")
         except AttributeError:
             pass
 
         try:
             result.st_rdev = 1
-            self.fail("No exception thrown")
+            self.fail("No exception raised")
         except (AttributeError, TypeError):
             pass
 
         try:
             result.parrot = 1
-            self.fail("No exception thrown")
+            self.fail("No exception raised")
         except AttributeError:
             pass
 
         # Use the stat_result constructor with a too-short tuple.
         try:
             result2 = os.stat_result((10,))
-            self.fail("No exception thrown")
+            self.fail("No exception raised")
         except TypeError:
             pass
 
@@ -233,20 +233,20 @@
         # Make sure that assignment really fails
         try:
             result.f_bfree = 1
-            self.fail("No exception thrown")
+            self.fail("No exception raised")
         except AttributeError:
             pass
 
         try:
             result.parrot = 1
-            self.fail("No exception thrown")
+            self.fail("No exception raised")
         except AttributeError:
             pass
 
         # Use the constructor with a too-short tuple.
         try:
             result2 = os.statvfs_result((10,))
-            self.fail("No exception thrown")
+            self.fail("No exception raised")
         except TypeError:
             pass
 
diff --git a/Lib/test/test_pty.py b/Lib/test/test_pty.py
index fcebce7..4d471d5 100644
--- a/Lib/test/test_pty.py
+++ b/Lib/test/test_pty.py
@@ -152,7 +152,7 @@
             # platform-dependent amount of data is written to its fd.  On
             # Linux 2.6, it's 4000 bytes and the child won't block, but on OS
             # X even the small writes in the child above will block it.  Also
-            # on Linux, the read() will throw an OSError (input/output error)
+            # on Linux, the read() will raise an OSError (input/output error)
             # when it tries to read past the end of the buffer but the child's
             # already exited, so catch and discard those exceptions.  It's not
             # worth checking for EIO.
diff --git a/Lib/test/test_sax.py b/Lib/test/test_sax.py
index 1225d6e..d6ed6db 100644
--- a/Lib/test/test_sax.py
+++ b/Lib/test/test_sax.py
@@ -389,7 +389,7 @@
     def test_5027_1(self):
         # The xml prefix (as in xml:lang below) is reserved and bound by
         # definition to http://www.w3.org/XML/1998/namespace.  XMLGenerator had
-        # a bug whereby a KeyError is thrown because this namespace is missing
+        # a bug whereby a KeyError is raised because this namespace is missing
         # from a dictionary.
         #
         # This test demonstrates the bug by parsing a document.
@@ -415,7 +415,7 @@
     def test_5027_2(self):
         # The xml prefix (as in xml:lang below) is reserved and bound by
         # definition to http://www.w3.org/XML/1998/namespace.  XMLGenerator had
-        # a bug whereby a KeyError is thrown because this namespace is missing
+        # a bug whereby a KeyError is raised because this namespace is missing
         # from a dictionary.
         #
         # This test demonstrates the bug by direct manipulation of the
diff --git a/Lib/test/test_signal.py b/Lib/test/test_signal.py
index 8df1bf0..4a1b4a6 100644
--- a/Lib/test/test_signal.py
+++ b/Lib/test/test_signal.py
@@ -113,7 +113,7 @@
             # This wait should be interrupted by the signal's exception.
             self.wait(child)
             time.sleep(1)  # Give the signal time to be delivered.
-            self.fail('HandlerBCalled exception not thrown')
+            self.fail('HandlerBCalled exception not raised')
         except HandlerBCalled:
             self.assertTrue(self.b_called)
             self.assertFalse(self.a_called)
@@ -152,7 +152,7 @@
         # test-running process from all the signals. It then
         # communicates with that child process over a pipe and
         # re-raises information about any exceptions the child
-        # throws. The real work happens in self.run_test().
+        # raises. The real work happens in self.run_test().
         os_done_r, os_done_w = os.pipe()
         with closing(os.fdopen(os_done_r, 'rb')) as done_r, \
              closing(os.fdopen(os_done_w, 'wb')) as done_w:
diff --git a/Lib/test/test_socketserver.py b/Lib/test/test_socketserver.py
index ca23301..160f5b8 100644
--- a/Lib/test/test_socketserver.py
+++ b/Lib/test/test_socketserver.py
@@ -58,7 +58,7 @@
 def simple_subprocess(testcase):
     pid = os.fork()
     if pid == 0:
-        # Don't throw an exception; it would be caught by the test harness.
+        # Don't raise an exception; it would be caught by the test harness.
         os._exit(72)
     yield None
     pid2, status = os.waitpid(pid, 0)
diff --git a/Lib/test/test_sys_settrace.py b/Lib/test/test_sys_settrace.py
index ea2bb29..ba3bc2e 100644
--- a/Lib/test/test_sys_settrace.py
+++ b/Lib/test/test_sys_settrace.py
@@ -418,7 +418,7 @@
                 except ValueError:
                     pass
                 else:
-                    self.fail("exception not thrown!")
+                    self.fail("exception not raised!")
         except RuntimeError:
             self.fail("recursion counter not reset")
 
diff --git a/Lib/test/test_time.py b/Lib/test/test_time.py
index ce57d87..d3c49bb 100644
--- a/Lib/test/test_time.py
+++ b/Lib/test/test_time.py
@@ -106,7 +106,7 @@
 
     def test_strptime(self):
         # Should be able to go round-trip from strftime to strptime without
-        # throwing an exception.
+        # raising an exception.
         tt = time.gmtime(self.t)
         for directive in ('a', 'A', 'b', 'B', 'c', 'd', 'H', 'I',
                           'j', 'm', 'M', 'p', 'S',
diff --git a/Lib/test/test_uu.py b/Lib/test/test_uu.py
index d6875c5..cbf6724 100644
--- a/Lib/test/test_uu.py
+++ b/Lib/test/test_uu.py
@@ -80,7 +80,7 @@
         out = io.BytesIO()
         try:
             uu.decode(inp, out)
-            self.fail("No exception thrown")
+            self.fail("No exception raised")
         except uu.Error as e:
             self.assertEqual(str(e), "Truncated input file")
 
@@ -89,7 +89,7 @@
         out = io.BytesIO()
         try:
             uu.decode(inp, out)
-            self.fail("No exception thrown")
+            self.fail("No exception raised")
         except uu.Error as e:
             self.assertEqual(str(e), "No valid begin line found in input file")
 
diff --git a/Lib/test/test_winreg.py b/Lib/test/test_winreg.py
index 55163c9..918b312 100644
--- a/Lib/test/test_winreg.py
+++ b/Lib/test/test_winreg.py
@@ -245,7 +245,7 @@
 
     def test_changing_value(self):
         # Issue2810: A race condition in 2.6 and 3.1 may cause
-        # EnumValue or QueryValue to throw "WindowsError: More data is
+        # EnumValue or QueryValue to raise "WindowsError: More data is
         # available"
         done = False
 
@@ -291,7 +291,7 @@
 
     def test_dynamic_key(self):
         # Issue2810, when the value is dynamically generated, these
-        # throw "WindowsError: More data is available" in 2.6 and 3.1
+        # raise "WindowsError: More data is available" in 2.6 and 3.1
         try:
             EnumValue(HKEY_PERFORMANCE_DATA, 0)
         except OSError as e:
diff --git a/Lib/test/test_zipfile.py b/Lib/test/test_zipfile.py
index 5bc03b5..e07380d 100644
--- a/Lib/test/test_zipfile.py
+++ b/Lib/test/test_zipfile.py
@@ -873,7 +873,7 @@
         with zipfile.ZipFile(data, mode="w") as zipf:
             zipf.writestr("foo.txt", "O, for a Muse of Fire!")
 
-        # This is correct; calling .read on a closed ZipFile should throw
+        # This is correct; calling .read on a closed ZipFile should raise
         # a RuntimeError, and so should calling .testzip.  An earlier
         # version of .testzip would swallow this exception (and any other)
         # and report that the first file in the archive was corrupt.
diff --git a/Lib/tkinter/__init__.py b/Lib/tkinter/__init__.py
index 7073662..f2cb60f 100644
--- a/Lib/tkinter/__init__.py
+++ b/Lib/tkinter/__init__.py
@@ -147,7 +147,7 @@
     pass
 
 def _exit(code=0):
-    """Internal function. Calling it will throw the exception SystemExit."""
+    """Internal function. Calling it will raise the exception SystemExit."""
     try:
         code = int(code)
     except ValueError:
diff --git a/Lib/unittest/case.py b/Lib/unittest/case.py
index bd47493..bea8107 100644
--- a/Lib/unittest/case.py
+++ b/Lib/unittest/case.py
@@ -528,10 +528,10 @@
 
 
     def assertRaises(self, excClass, callableObj=None, *args, **kwargs):
-        """Fail unless an exception of class excClass is thrown
+        """Fail unless an exception of class excClass is raised
            by callableObj when invoked with arguments args and keyword
            arguments kwargs. If a different type of exception is
-           thrown, it will not be caught, and the test case will be
+           raised, it will not be caught, and the test case will be
            deemed to have suffered an error, exactly as for an
            unexpected exception.
 
diff --git a/Lib/wsgiref/validate.py b/Lib/wsgiref/validate.py
index 05a485d..49eaa51 100644
--- a/Lib/wsgiref/validate.py
+++ b/Lib/wsgiref/validate.py
@@ -139,9 +139,9 @@
     When applied between a WSGI server and a WSGI application, this
     middleware will check for WSGI compliancy on a number of levels.
     This middleware does not modify the request or response in any
-    way, but will throw an AssertionError if anything seems off
+    way, but will raise an AssertionError if anything seems off
     (except for a failure to close the application iterator, which
-    will be printed to stderr -- there's no way to throw an exception
+    will be printed to stderr -- there's no way to raise an exception
     at that point).
     """
 
diff --git a/Lib/xml/sax/_exceptions.py b/Lib/xml/sax/_exceptions.py
index fdd614a..a9b2ba3 100644
--- a/Lib/xml/sax/_exceptions.py
+++ b/Lib/xml/sax/_exceptions.py
@@ -12,7 +12,7 @@
     the application: you can subclass it to provide additional
     functionality, or to add localization. Note that although you will
     receive a SAXException as the argument to the handlers in the
-    ErrorHandler interface, you are not actually required to throw
+    ErrorHandler interface, you are not actually required to raise
     the exception; instead, you can simply read the information in
     it."""
 
@@ -50,7 +50,7 @@
     the original XML document. Note that although the application will
     receive a SAXParseException as the argument to the handlers in the
     ErrorHandler interface, the application is not actually required
-    to throw the exception; instead, it can simply read the
+    to raise the exception; instead, it can simply read the
     information in it and take a different action.
 
     Since this exception is a subclass of SAXException, it inherits
@@ -62,7 +62,7 @@
         self._locator = locator
 
         # We need to cache this stuff at construction time.
-        # If this exception is thrown, the objects through which we must
+        # If this exception is raised, the objects through which we must
         # traverse to get this information may be deleted by the time
         # it gets caught.
         self._systemId = self._locator.getSystemId()
diff --git a/Lib/xml/sax/xmlreader.py b/Lib/xml/sax/xmlreader.py
index 5ce30b0..7ef497f 100644
--- a/Lib/xml/sax/xmlreader.py
+++ b/Lib/xml/sax/xmlreader.py
@@ -68,7 +68,7 @@
 
         SAX parsers are not required to provide localization for errors
         and warnings; if they cannot support the requested locale,
-        however, they must throw a SAX exception. Applications may
+        however, they must raise a SAX exception. Applications may
         request a locale change in the middle of a parse."""
         raise SAXNotSupportedException("Locale support not implemented")
 
diff --git a/Lib/xmlrpc/client.py b/Lib/xmlrpc/client.py
index 97d5aac..ec8d8e9 100644
--- a/Lib/xmlrpc/client.py
+++ b/Lib/xmlrpc/client.py
@@ -800,7 +800,7 @@
 
 class MultiCallIterator:
     """Iterates over the results of a multicall. Exceptions are
-    thrown in response to xmlrpc faults."""
+    raised in response to xmlrpc faults."""
 
     def __init__(self, results):
         self.results = results
diff --git a/Modules/_io/_iomodule.c b/Modules/_io/_iomodule.c
index e18aec6..cec0671 100644
--- a/Modules/_io/_iomodule.c
+++ b/Modules/_io/_iomodule.c
@@ -59,7 +59,7 @@
 "At the top of the I/O hierarchy is the abstract base class IOBase. It\n"
 "defines the basic interface to a stream. Note, however, that there is no\n"
 "separation between reading and writing to streams; implementations are\n"
-"allowed to throw an IOError if they do not support a given operation.\n"
+"allowed to raise an IOError if they do not support a given operation.\n"
 "\n"
 "Extending IOBase is RawIOBase which deals simply with the reading and\n"
 "writing of raw bytes to a stream. FileIO subclasses RawIOBase to provide\n"
diff --git a/Modules/parsermodule.c b/Modules/parsermodule.c
index b8732dc..9497aae 100644
--- a/Modules/parsermodule.c
+++ b/Modules/parsermodule.c
@@ -718,7 +718,7 @@
             err_string("parse tree does not use a valid start symbol");
         }
     }
-    /*  Make sure we throw an exception on all errors.  We should never
+    /*  Make sure we raise an exception on all errors.  We should never
      *  get this, but we'd do well to be sure something is done.
      */
     if (st == NULL && !PyErr_Occurred())
@@ -824,7 +824,7 @@
         else if (!ISNONTERMINAL(type)) {
             /*
              *  It has to be one or the other; this is an error.
-             *  Throw an exception.
+             *  Raise an exception.
              */
             PyObject *err = Py_BuildValue("os", elem, "unknown node type.");
             PyErr_SetObject(parser_error, err);
@@ -876,7 +876,7 @@
     if (ISTERMINAL(num)) {
         /*
          *  The tuple is simple, but it doesn't start with a start symbol.
-         *  Throw an exception now and be done with it.
+         *  Raise an exception now and be done with it.
          */
         tuple = Py_BuildValue("os", tuple,
                     "Illegal syntax-tree; cannot start with terminal symbol.");
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 9f57673..0d2919b 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -349,7 +349,7 @@
 
 #if defined _MSC_VER && _MSC_VER >= 1400
 /* Microsoft CRT in VS2005 and higher will verify that a filehandle is
- * valid and throw an assertion if it isn't.
+ * valid and raise an assertion if it isn't.
  * Normally, an invalid fd is likely to be a C program error and therefore
  * an assertion can be useful, but it does contradict the POSIX standard
  * which for write(2) states:
diff --git a/Tools/scripts/serve.py b/Tools/scripts/serve.py
index 89b3d62..68c25f0 100755
--- a/Tools/scripts/serve.py
+++ b/Tools/scripts/serve.py
@@ -2,7 +2,7 @@
 '''
 Small wsgiref based web server. Takes a path to serve from and an
 optional port number (defaults to 8000), then tries to serve files.
-Mime types are guessed from the file names, 404 errors are thrown
+Mime types are guessed from the file names, 404 errors are raised
 if the file is not found. Used for the make serve target in Doc.
 '''
 import sys