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diff --git a/lib/python2.7/shlex.py b/lib/python2.7/shlex.py
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+# -*- coding: iso-8859-1 -*-
+"""A lexical analyzer class for simple shell-like syntaxes."""
+
+# Module and documentation by Eric S. Raymond, 21 Dec 1998
+# Input stacking and error message cleanup added by ESR, March 2000
+# push_source() and pop_source() made explicit by ESR, January 2001.
+# Posix compliance, split(), string arguments, and
+# iterator interface by Gustavo Niemeyer, April 2003.
+
+import os.path
+import sys
+from collections import deque
+
+try:
+    from cStringIO import StringIO
+except ImportError:
+    from StringIO import StringIO
+
+__all__ = ["shlex", "split"]
+
+class shlex:
+    "A lexical analyzer class for simple shell-like syntaxes."
+    def __init__(self, instream=None, infile=None, posix=False):
+        if isinstance(instream, basestring):
+            instream = StringIO(instream)
+        if instream is not None:
+            self.instream = instream
+            self.infile = infile
+        else:
+            self.instream = sys.stdin
+            self.infile = None
+        self.posix = posix
+        if posix:
+            self.eof = None
+        else:
+            self.eof = ''
+        self.commenters = '#'
+        self.wordchars = ('abcdfeghijklmnopqrstuvwxyz'
+                          'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_')
+        if self.posix:
+            self.wordchars += ('Яабвгдежзийклмнопрстуфхцшщъыьэюя'
+                               'АБВГДЕЖЗИЙКЛМНОПРСТУФХЦШЩЪЫЬЭЮ')
+        self.whitespace = ' \t\r\n'
+        self.whitespace_split = False
+        self.quotes = '\'"'
+        self.escape = '\\'
+        self.escapedquotes = '"'
+        self.state = ' '
+        self.pushback = deque()
+        self.lineno = 1
+        self.debug = 0
+        self.token = ''
+        self.filestack = deque()
+        self.source = None
+        if self.debug:
+            print 'shlex: reading from %s, line %d' \
+                  % (self.instream, self.lineno)
+
+    def push_token(self, tok):
+        "Push a token onto the stack popped by the get_token method"
+        if self.debug >= 1:
+            print "shlex: pushing token " + repr(tok)
+        self.pushback.appendleft(tok)
+
+    def push_source(self, newstream, newfile=None):
+        "Push an input source onto the lexer's input source stack."
+        if isinstance(newstream, basestring):
+            newstream = StringIO(newstream)
+        self.filestack.appendleft((self.infile, self.instream, self.lineno))
+        self.infile = newfile
+        self.instream = newstream
+        self.lineno = 1
+        if self.debug:
+            if newfile is not None:
+                print 'shlex: pushing to file %s' % (self.infile,)
+            else:
+                print 'shlex: pushing to stream %s' % (self.instream,)
+
+    def pop_source(self):
+        "Pop the input source stack."
+        self.instream.close()
+        (self.infile, self.instream, self.lineno) = self.filestack.popleft()
+        if self.debug:
+            print 'shlex: popping to %s, line %d' \
+                  % (self.instream, self.lineno)
+        self.state = ' '
+
+    def get_token(self):
+        "Get a token from the input stream (or from stack if it's nonempty)"
+        if self.pushback:
+            tok = self.pushback.popleft()
+            if self.debug >= 1:
+                print "shlex: popping token " + repr(tok)
+            return tok
+        # No pushback.  Get a token.
+        raw = self.read_token()
+        # Handle inclusions
+        if self.source is not None:
+            while raw == self.source:
+                spec = self.sourcehook(self.read_token())
+                if spec:
+                    (newfile, newstream) = spec
+                    self.push_source(newstream, newfile)
+                raw = self.get_token()
+        # Maybe we got EOF instead?
+        while raw == self.eof:
+            if not self.filestack:
+                return self.eof
+            else:
+                self.pop_source()
+                raw = self.get_token()
+        # Neither inclusion nor EOF
+        if self.debug >= 1:
+            if raw != self.eof:
+                print "shlex: token=" + repr(raw)
+            else:
+                print "shlex: token=EOF"
+        return raw
+
+    def read_token(self):
+        quoted = False
+        escapedstate = ' '
+        while True:
+            nextchar = self.instream.read(1)
+            if nextchar == '\n':
+                self.lineno = self.lineno + 1
+            if self.debug >= 3:
+                print "shlex: in state", repr(self.state), \
+                      "I see character:", repr(nextchar)
+            if self.state is None:
+                self.token = ''        # past end of file
+                break
+            elif self.state == ' ':
+                if not nextchar:
+                    self.state = None  # end of file
+                    break
+                elif nextchar in self.whitespace:
+                    if self.debug >= 2:
+                        print "shlex: I see whitespace in whitespace state"
+                    if self.token or (self.posix and quoted):
+                        break   # emit current token
+                    else:
+                        continue
+                elif nextchar in self.commenters:
+                    self.instream.readline()
+                    self.lineno = self.lineno + 1
+                elif self.posix and nextchar in self.escape:
+                    escapedstate = 'a'
+                    self.state = nextchar
+                elif nextchar in self.wordchars:
+                    self.token = nextchar
+                    self.state = 'a'
+                elif nextchar in self.quotes:
+                    if not self.posix:
+                        self.token = nextchar
+                    self.state = nextchar
+                elif self.whitespace_split:
+                    self.token = nextchar
+                    self.state = 'a'
+                else:
+                    self.token = nextchar
+                    if self.token or (self.posix and quoted):
+                        break   # emit current token
+                    else:
+                        continue
+            elif self.state in self.quotes:
+                quoted = True
+                if not nextchar:      # end of file
+                    if self.debug >= 2:
+                        print "shlex: I see EOF in quotes state"
+                    # XXX what error should be raised here?
+                    raise ValueError, "No closing quotation"
+                if nextchar == self.state:
+                    if not self.posix:
+                        self.token = self.token + nextchar
+                        self.state = ' '
+                        break
+                    else:
+                        self.state = 'a'
+                elif self.posix and nextchar in self.escape and \
+                     self.state in self.escapedquotes:
+                    escapedstate = self.state
+                    self.state = nextchar
+                else:
+                    self.token = self.token + nextchar
+            elif self.state in self.escape:
+                if not nextchar:      # end of file
+                    if self.debug >= 2:
+                        print "shlex: I see EOF in escape state"
+                    # XXX what error should be raised here?
+                    raise ValueError, "No escaped character"
+                # In posix shells, only the quote itself or the escape
+                # character may be escaped within quotes.
+                if escapedstate in self.quotes and \
+                   nextchar != self.state and nextchar != escapedstate:
+                    self.token = self.token + self.state
+                self.token = self.token + nextchar
+                self.state = escapedstate
+            elif self.state == 'a':
+                if not nextchar:
+                    self.state = None   # end of file
+                    break
+                elif nextchar in self.whitespace:
+                    if self.debug >= 2:
+                        print "shlex: I see whitespace in word state"
+                    self.state = ' '
+                    if self.token or (self.posix and quoted):
+                        break   # emit current token
+                    else:
+                        continue
+                elif nextchar in self.commenters:
+                    self.instream.readline()
+                    self.lineno = self.lineno + 1
+                    if self.posix:
+                        self.state = ' '
+                        if self.token or (self.posix and quoted):
+                            break   # emit current token
+                        else:
+                            continue
+                elif self.posix and nextchar in self.quotes:
+                    self.state = nextchar
+                elif self.posix and nextchar in self.escape:
+                    escapedstate = 'a'
+                    self.state = nextchar
+                elif nextchar in self.wordchars or nextchar in self.quotes \
+                    or self.whitespace_split:
+                    self.token = self.token + nextchar
+                else:
+                    self.pushback.appendleft(nextchar)
+                    if self.debug >= 2:
+                        print "shlex: I see punctuation in word state"
+                    self.state = ' '
+                    if self.token or (self.posix and quoted):
+                        break   # emit current token
+                    else:
+                        continue
+        result = self.token
+        self.token = ''
+        if self.posix and not quoted and result == '':
+            result = None
+        if self.debug > 1:
+            if result:
+                print "shlex: raw token=" + repr(result)
+            else:
+                print "shlex: raw token=EOF"
+        return result
+
+    def sourcehook(self, newfile):
+        "Hook called on a filename to be sourced."
+        if newfile[0] == '"':
+            newfile = newfile[1:-1]
+        # This implements cpp-like semantics for relative-path inclusion.
+        if isinstance(self.infile, basestring) and not os.path.isabs(newfile):
+            newfile = os.path.join(os.path.dirname(self.infile), newfile)
+        return (newfile, open(newfile, "r"))
+
+    def error_leader(self, infile=None, lineno=None):
+        "Emit a C-compiler-like, Emacs-friendly error-message leader."
+        if infile is None:
+            infile = self.infile
+        if lineno is None:
+            lineno = self.lineno
+        return "\"%s\", line %d: " % (infile, lineno)
+
+    def __iter__(self):
+        return self
+
+    def next(self):
+        token = self.get_token()
+        if token == self.eof:
+            raise StopIteration
+        return token
+
+def split(s, comments=False, posix=True):
+    lex = shlex(s, posix=posix)
+    lex.whitespace_split = True
+    if not comments:
+        lex.commenters = ''
+    return list(lex)
+
+if __name__ == '__main__':
+    if len(sys.argv) == 1:
+        lexer = shlex()
+    else:
+        file = sys.argv[1]
+        lexer = shlex(open(file), file)
+    while 1:
+        tt = lexer.get_token()
+        if tt:
+            print "Token: " + repr(tt)
+        else:
+            break