diff --git a/Doc/tools/sphinxext/pyspecific.py b/Doc/tools/sphinxext/pyspecific.py
index d389243..c3268e9 100644
--- a/Doc/tools/sphinxext/pyspecific.py
+++ b/Doc/tools/sphinxext/pyspecific.py
@@ -92,6 +92,9 @@
         finally:
             f.close()
 
+# Support for checking for suspicious markup
+
+import suspicious
 
 # Support for documenting Opcodes
 
@@ -116,5 +119,6 @@
 def setup(app):
     app.add_role('issue', issue_role)
     app.add_builder(PydocTopicsBuilder)
+    app.add_builder(suspicious.CheckSuspiciousMarkupBuilder)
     app.add_description_unit('opcode', 'opcode', '%s (opcode)',
                              parse_opcode_signature)
diff --git a/Doc/tools/sphinxext/susp-ignored.csv b/Doc/tools/sphinxext/susp-ignored.csv
new file mode 100644
index 0000000..7e1a289
--- /dev/null
+++ b/Doc/tools/sphinxext/susp-ignored.csv
@@ -0,0 +1,164 @@
+c-api/arg,,:ref,"PyArg_ParseTuple(args, ""O|O:ref"", &object, &callback)"
+c-api/list,,:high,list[low:high]
+c-api/list,,:high,list[low:high] = itemlist
+c-api/sequence,,:i2,o[i1:i2]
+c-api/sequence,,:i2,o[i1:i2] = v
+c-api/sequence,,:i2,del o[i1:i2]
+c-api/unicode,,:end,str[start:end]
+distutils/apiref,,:action,http://pypi.python.org/pypi?:action=list_classifiers
+distutils/setupscript,,::,
+extending/embedding,,:numargs,"if(!PyArg_ParseTuple(args, "":numargs""))"
+extending/extending,,:set,"if (PyArg_ParseTuple(args, ""O:set_callback"", &temp)) {"
+extending/extending,,:myfunction,"PyArg_ParseTuple(args, ""D:myfunction"", &c);"
+extending/newtypes,,:call,"if (!PyArg_ParseTuple(args, ""sss:call"", &arg1, &arg2, &arg3)) {"
+extending/windows,,:initspam,/export:initspam
+howto/cporting,,:add,"if (!PyArg_ParseTuple(args, ""ii:add_ints"", &one, &two))"
+howto/cporting,,:encode,"if (!PyArg_ParseTuple(args, ""O:encode_object"", &myobj))"
+howto/cporting,,:say,"if (!PyArg_ParseTuple(args, ""U:say_hello"", &name))"
+howto/curses,,:black,"They are: 0:black, 1:red, 2:green, 3:yellow, 4:blue, 5:magenta, 6:cyan, and"
+howto/curses,,:blue,"They are: 0:black, 1:red, 2:green, 3:yellow, 4:blue, 5:magenta, 6:cyan, and"
+howto/curses,,:cyan,"They are: 0:black, 1:red, 2:green, 3:yellow, 4:blue, 5:magenta, 6:cyan, and"
+howto/curses,,:green,"They are: 0:black, 1:red, 2:green, 3:yellow, 4:blue, 5:magenta, 6:cyan, and"
+howto/curses,,:magenta,"They are: 0:black, 1:red, 2:green, 3:yellow, 4:blue, 5:magenta, 6:cyan, and"
+howto/curses,,:red,"They are: 0:black, 1:red, 2:green, 3:yellow, 4:blue, 5:magenta, 6:cyan, and"
+howto/curses,,:white,"7:white."
+howto/curses,,:yellow,"They are: 0:black, 1:red, 2:green, 3:yellow, 4:blue, 5:magenta, 6:cyan, and"
+howto/regex,,::,
+howto/regex,,:foo,(?:foo)
+howto/urllib2,,:example,"for example ""joe@password:example.com"""
+howto/webservers,,.. image:,.. image:: http.png
+library/audioop,,:ipos,"# factor = audioop.findfactor(in_test[ipos*2:ipos*2+len(out_test)],"
+library/datetime,,:MM,
+library/datetime,,:SS,
+library/decimal,,:optional,"trailneg:optional trailing minus indicator"
+library/difflib,,:ahi,a[alo:ahi]
+library/difflib,,:bhi,b[blo:bhi]
+library/difflib,,:i2,
+library/difflib,,:j2,
+library/difflib,,:i1,
+library/dis,,:TOS,
+library/dis,,`,TOS = `TOS`
+library/doctest,,`,``factorial`` from the ``example`` module:
+library/doctest,,`,The ``example`` module
+library/doctest,,`,Using ``factorial``
+library/functions,,:step,a[start:stop:step]
+library/functions,,:stop,"a[start:stop, i]"
+library/functions,,:stop,a[start:stop:step]
+library/hotshot,,:lineno,"ncalls  tottime  percall  cumtime  percall filename:lineno(function)"
+library/httplib,,:port,host:port
+library/imaplib,,:MM,"""DD-Mmm-YYYY HH:MM:SS +HHMM"""
+library/imaplib,,:SS,"""DD-Mmm-YYYY HH:MM:SS +HHMM"""
+library/linecache,,:sys,"sys:x:3:3:sys:/dev:/bin/sh"
+library/logging,,:And,
+library/logging,,:package1,
+library/logging,,:package2,
+library/logging,,:root,
+library/logging,,:This,
+library/logging,,:port,host:port
+library/mmap,,:i2,obj[i1:i2]
+library/multiprocessing,,:queue,">>> QueueManager.register('get_queue', callable=lambda:queue)"
+library/multiprocessing,,`,">>> l._callmethod('__getitem__', (20,))     # equiv to `l[20]`"
+library/multiprocessing,,`,">>> l._callmethod('__getslice__', (2, 7))   # equiv to `l[2:7]`"
+library/multiprocessing,,`,# `BaseManager`.
+library/multiprocessing,,`,# `Pool.imap()` (which will save on the amount of code needed anyway).
+library/multiprocessing,,`,# A test file for the `multiprocessing` package
+library/multiprocessing,,`,# A test of `multiprocessing.Pool` class
+library/multiprocessing,,`,# Add more tasks using `put()`
+library/multiprocessing,,`,# create server for a `HostManager` object
+library/multiprocessing,,`,# Depends on `multiprocessing` package -- tested with `processing-0.60`
+library/multiprocessing,,`,# in the original order then consider using `Pool.map()` or
+library/multiprocessing,,`,# Not sure if we should synchronize access to `socket.accept()` method by
+library/multiprocessing,,`,# object.  (We import `multiprocessing.reduction` to enable this pickling.)
+library/multiprocessing,,`,# register the Foo class; make `f()` and `g()` accessible via proxy
+library/multiprocessing,,`,# register the Foo class; make `g()` and `_h()` accessible via proxy
+library/multiprocessing,,`,# register the generator function baz; use `GeneratorProxy` to make proxies
+library/multiprocessing,,`,`Cluster` is a subclass of `SyncManager` so it allows creation of
+library/multiprocessing,,`,`hostname` gives the name of the host.  If hostname is not
+library/multiprocessing,,`,`slots` is used to specify the number of slots for processes on
+library/optparse,,:len,"del parser.rargs[:len(value)]"
+library/os.path,,:foo,c:foo
+library/parser,,`,"""Make a function that raises an argument to the exponent `exp`."""
+library/posix,,`,"CFLAGS=""`getconf LFS_CFLAGS`"" OPT=""-g -O2 $CFLAGS"""
+library/profile,,:lineno,ncalls  tottime  percall  cumtime  percall filename:lineno(function)
+library/profile,,:lineno,filename:lineno(function)
+library/pyexpat,,:elem1,<py:elem1 />
+library/pyexpat,,:py,"xmlns:py = ""http://www.python.org/ns/"">"
+library/repr,,`,"return `obj`"
+library/smtplib,,:port,"as well as a regular host:port server."
+library/socket,,::,'5aef:2b::8'
+library/sqlite3,,:memory,
+library/sqlite3,,:age,"select name_last, age from people where name_last=:who and age=:age"
+library/sqlite3,,:who,"select name_last, age from people where name_last=:who and age=:age"
+library/ssl,,:My,"Organization Name (eg, company) [Internet Widgits Pty Ltd]:My Organization, Inc."
+library/ssl,,:My,"Organizational Unit Name (eg, section) []:My Group"
+library/ssl,,:myserver,"Common Name (eg, YOUR name) []:myserver.mygroup.myorganization.com"
+library/ssl,,:MyState,State or Province Name (full name) [Some-State]:MyState
+library/ssl,,:ops,Email Address []:ops@myserver.mygroup.myorganization.com
+library/ssl,,:Some,"Locality Name (eg, city) []:Some City"
+library/ssl,,:US,Country Name (2 letter code) [AU]:US
+library/stdtypes,,:len,s[len(s):len(s)]
+library/stdtypes,,:len,s[len(s):len(s)]
+library/string,,:end,s[start:end]
+library/string,,:end,s[start:end]
+library/subprocess,,`,"output=`mycmd myarg`"
+library/subprocess,,`,"output=`dmesg | grep hda`"
+library/tarfile,,:compression,filemode[:compression]
+library/tarfile,,:gz,
+library/tarfile,,:bz2,
+library/time,,:mm,
+library/time,,:ss,
+library/turtle,,::,Example::
+library/urllib,,:port,:port
+library/urllib2,,:password,"""joe:password@python.org"""
+library/uuid,,:uuid,urn:uuid:12345678-1234-5678-1234-567812345678
+library/xmlrpclib,,:pass,http://user:pass@host:port/path
+library/xmlrpclib,,:pass,user:pass
+library/xmlrpclib,,:port,http://user:pass@host:port/path
+license,,`,THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+license,,:zooko,mailto:zooko@zooko.com
+license,,`,THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+reference/datamodel,,:step,a[i:j:step]
+reference/datamodel,,:max,
+reference/expressions,,:index,x[index:index]
+reference/expressions,,:datum,{key:datum...}
+reference/expressions,,`,`expressions...`
+reference/grammar,,:output,#diagram:output
+reference/grammar,,:rules,#diagram:rules
+reference/grammar,,:token,#diagram:token
+reference/grammar,,`,'`' testlist1 '`'
+reference/lexical_analysis,,:fileencoding,# vim:fileencoding=<encoding-name>
+reference/lexical_analysis,,`,",       :       .       `       =       ;"
+tutorial/datastructures,,:value,key:value pairs within the braces adds initial key:value pairs
+tutorial/datastructures,,:value,It is also possible to delete a key:value
+tutorial/stdlib2,,:start,"fields = struct.unpack('<IIIHH', data[start:start+16])"
+tutorial/stdlib2,,:start,extra = data[start:start+extra_size]
+tutorial/stdlib2,,:start,filename = data[start:start+filenamesize]
+tutorial/stdlib2,,:config,"logging.warning('Warning:config file %s not found', 'server.conf')"
+tutorial/stdlib2,,:config,WARNING:root:Warning:config file server.conf not found
+tutorial/stdlib2,,:Critical,CRITICAL:root:Critical error -- shutting down
+tutorial/stdlib2,,:Error,ERROR:root:Error occurred
+tutorial/stdlib2,,:root,CRITICAL:root:Critical error -- shutting down
+tutorial/stdlib2,,:root,ERROR:root:Error occurred
+tutorial/stdlib2,,:root,WARNING:root:Warning:config file server.conf not found
+tutorial/stdlib2,,:Warning,WARNING:root:Warning:config file server.conf not found
+using/cmdline,,:line,file:line: category: message
+using/cmdline,,:category,action:message:category:module:line
+using/cmdline,,:line,action:message:category:module:line
+using/cmdline,,:message,action:message:category:module:line
+using/cmdline,,:module,action:message:category:module:line
+using/cmdline,,:errorhandler,:errorhandler
+using/windows,162,`,`` this fixes syntax highlighting errors in some editors due to the \\\\ hackery
+using/windows,170,`,``
+whatsnew/2.0,418,:len,
+whatsnew/2.3,,::,
+whatsnew/2.3,,:config,
+whatsnew/2.3,,:Critical,
+whatsnew/2.3,,:Error,
+whatsnew/2.3,,:Problem,
+whatsnew/2.3,,:root,
+whatsnew/2.3,,:Warning,
+whatsnew/2.4,,::,
+whatsnew/2.4,,:System,
+whatsnew/2.5,,:memory,:memory:
+whatsnew/2.5,,:step,[start:stop:step]
+whatsnew/2.5,,:stop,[start:stop:step]
diff --git a/Doc/tools/sphinxext/suspicious.py b/Doc/tools/sphinxext/suspicious.py
new file mode 100644
index 0000000..9a2f601
--- /dev/null
+++ b/Doc/tools/sphinxext/suspicious.py
@@ -0,0 +1,237 @@
+"""
+Try to detect suspicious constructs, resembling markup
+that has leaked into the final output.
+
+Suspicious lines are reported in a comma-separated-file,
+``suspicious.csv``, located in the output directory.
+
+The file is utf-8 encoded, and each line contains four fields:
+
+ * document name (normalized)
+ * line number in the source document
+ * problematic text
+ * complete line showing the problematic text in context
+
+It is common to find many false positives. To avoid reporting them
+again and again, they may be added to the ``ignored.csv`` file
+(located in the configuration directory). The file has the same
+format as ``suspicious.csv`` with a few differences:
+
+  - each line defines a rule; if the rule matches, the issue
+    is ignored.
+  - line number may be empty (that is, nothing between the
+    commas: ",,"). In this case, line numbers are ignored (the
+    rule matches anywhere in the file).
+  - the last field does not have to be a complete line; some
+    surrounding text (never more than a line) is enough for
+    context.
+
+Rules are processed sequentially. A rule matches when:
+
+ * document names are the same
+ * problematic texts are the same
+ * line numbers are close to each other (5 lines up or down)
+ * the rule text is completely contained into the source line
+
+The simplest way to create the ignored.csv file is by copying
+undesired entries from suspicious.csv (possibly trimming the last
+field.)
+
+Copyright 2009 Gabriel A. Genellina
+
+"""
+
+import os, sys
+import csv
+import re
+from docutils import nodes
+from sphinx.builder import Builder
+
+detect_all = re.compile(ur'''
+    ::(?=[^=])|            # two :: (but NOT ::=)
+    :[a-zA-Z][a-zA-Z0-9]+| # :foo
+    `|                     # ` (seldom used by itself)
+    (?<!\.)\.\.[ \t]*\w+:  # .. foo: (but NOT ... else:)
+    ''', re.UNICODE | re.VERBOSE).finditer
+
+class Rule:
+    def __init__(self, docname, lineno, issue, line):
+        "A rule for ignoring issues"
+        self.docname = docname # document to which this rule applies
+        self.lineno = lineno   # line number in the original source;
+                               # this rule matches only near that.
+                               # None -> don't care
+        self.issue = issue     # the markup fragment that triggered this rule
+        self.line = line       # text of the container element (single line only)
+
+
+class CheckSuspiciousMarkupBuilder(Builder):
+    """
+    Checks for possibly invalid markup that may leak into the output
+    """
+    name = 'suspicious'
+
+    def init(self):
+        # create output file
+        self.log_file_name = os.path.join(self.outdir, 'suspicious.csv')
+        open(self.log_file_name, 'w').close()
+        # load database of previously ignored issues
+        self.load_rules(os.path.join(os.path.dirname(__file__), 'susp-ignored.csv'))
+
+    def get_outdated_docs(self):
+        return self.env.found_docs
+
+    def get_target_uri(self, docname, typ=None):
+        return ''
+
+    def prepare_writing(self, docnames):
+        ### PYTHON PROJECT SPECIFIC ###
+        for name in set(docnames):
+            if name.split('/', 1)[0] == 'documenting':
+                docnames.remove(name)
+        ### PYTHON PROJECT SPECIFIC ###
+
+    def write_doc(self, docname, doctree):
+        self.any_issue = False # set when any issue is encountered in this document
+        self.docname = docname
+        visitor = SuspiciousVisitor(doctree, self)
+        doctree.walk(visitor)
+
+    def finish(self):
+        return
+
+    def check_issue(self, line, lineno, issue):
+        if not self.is_ignored(line, lineno, issue):
+            self.report_issue(line, lineno, issue)
+
+    def is_ignored(self, line, lineno, issue):
+        """Determine whether this issue should be ignored.
+        """
+        docname = self.docname
+        for rule in self.rules:
+            if rule.docname != docname: continue
+            if rule.issue != issue: continue
+            # Both lines must match *exactly*. This is rather strict,
+            # and probably should be improved.
+            # Doing fuzzy matches with levenshtein distance could work,
+            # but that means bringing other libraries...
+            # Ok, relax that requirement: just check if the rule fragment
+            # is contained in the document line
+            if rule.line not in line: continue
+            # Check both line numbers. If they're "near"
+            # this rule matches. (lineno=None means "don't care")
+            if (rule.lineno is not None) and \
+                abs(rule.lineno - lineno) > 5: continue
+            # if it came this far, the rule matched
+            return True
+        return False
+
+    def report_issue(self, text, lineno, issue):
+        if not self.any_issue: self.info()
+        self.any_issue = True
+        self.write_log_entry(lineno, issue, text)
+        self.warn('[%s:%d] "%s" found in "%-.120s"' % (
+                self.docname.encode(sys.getdefaultencoding(),'replace'),
+                lineno,
+                issue.encode(sys.getdefaultencoding(),'replace'),
+                text.strip().encode(sys.getdefaultencoding(),'replace')))
+        self.app.statuscode = 1
+
+    def write_log_entry(self, lineno, issue, text):
+        f = open(self.log_file_name, 'ab')
+        writer = csv.writer(f)
+        writer.writerow([self.docname.encode('utf-8'),
+                lineno,
+                issue.encode('utf-8'),
+                text.strip().encode('utf-8')])
+        del writer
+        f.close()
+
+    def load_rules(self, filename):
+        """Load database of previously ignored issues.
+
+        A csv file, with exactly the same format as suspicious.csv
+        Fields: document name (normalized), line number, issue, surrounding text
+        """
+        self.info("loading ignore rules... ", nonl=1)
+        self.rules = rules = []
+        try: f = open(filename, 'rb')
+        except IOError: return
+        for i, row in enumerate(csv.reader(f)):
+            if len(row) != 4:
+                raise ValueError, "wrong format in %s, line %d: %s" % (filename, i+1, row)
+            docname, lineno, issue, text = row
+            docname = docname.decode('utf-8')
+            if lineno: lineno = int(lineno)
+            else: lineno = None
+            issue = issue.decode('utf-8')
+            text = text.decode('utf-8')
+            rule = Rule(docname, lineno, issue, text)
+            rules.append(rule)
+        f.close()
+        self.info('done, %d rules loaded' % len(self.rules))
+
+
+def get_lineno(node):
+    "Obtain line number information for a node"
+    lineno = None
+    while lineno is None and node:
+        node = node.parent
+        lineno = node.line
+    return lineno
+
+
+def extract_line(text, index):
+    """text may be a multiline string; extract
+    only the line containing the given character index.
+
+    >>> extract_line("abc\ndefgh\ni", 6)
+    >>> 'defgh'
+    >>> for i in (0, 2, 3, 4, 10):
+    ...   print extract_line("abc\ndefgh\ni", i)
+    abc
+    abc
+    abc
+    defgh
+    defgh
+    i
+    """
+    p = text.rfind('\n', 0, index) + 1
+    q = text.find('\n', index)
+    if q<0: q = len(text)
+    return text[p:q]
+
+
+class SuspiciousVisitor(nodes.GenericNodeVisitor):
+
+    lastlineno = 0
+
+    def __init__(self, document, builder):
+        nodes.GenericNodeVisitor.__init__(self, document)
+        self.builder = builder
+
+    def default_visit(self, node):
+        if isinstance(node, (nodes.Text, nodes.image)): # direct text containers
+            text = node.astext()
+            # lineno seems to go backwards sometimes (?)
+            self.lastlineno = lineno = max(get_lineno(node) or 0, self.lastlineno)
+            seen = set() # don't report the same issue more than only once per line
+            for match in detect_all(text):
+                #import pdb; pdb.set_trace()
+                issue = match.group()
+                line = extract_line(text, match.start())
+                if (issue, line) not in seen:
+                    self.builder.check_issue(line, lineno, issue)
+                    seen.add((issue, line))
+
+    unknown_visit = default_visit
+
+    def visit_document(self, node):
+        self.lastlineno = 0
+
+    def visit_comment(self, node):
+        # ignore comments -- too much false positives.
+        # (although doing this could miss some errors;
+        # there were two sections "commented-out" by mistake
+        # in the Python docs that would not be catched)
+        raise nodes.SkipNode