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diff --git a/Demo/threads/squasher.py b/Demo/threads/squasher.py
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-# Coroutine example:  general coroutine transfers
-#
-# The program is a variation of a Simula 67 program due to Dahl & Hoare,
-# (Dahl/Dijkstra/Hoare, Structured Programming; Academic Press, 1972)
-# who in turn credit the original example to Conway.
-#
-# We have a number of input lines, terminated by a 0 byte.  The problem
-# is to squash them together into output lines containing 72 characters
-# each.  A semicolon must be added between input lines.  Runs of blanks
-# and tabs in input lines must be squashed into single blanks.
-# Occurrences of "**" in input lines must be replaced by "^".
-#
-# Here's a test case:
-
-test = """\
-   d    =   sqrt(b**2  -  4*a*c)
-twoa    =   2*a
-   L    =   -b/twoa
-   R    =   d/twoa
-  A1    =   L + R
-  A2    =   L - R\0
-"""
-
-# The program should print:
-
-# d = sqrt(b^2 - 4*a*c);twoa = 2*a; L = -b/twoa; R = d/twoa; A1 = L + R;
-#A2 = L - R
-#done
-
-# getline: delivers the next input line to its invoker
-# disassembler: grabs input lines from getline, and delivers them one
-#    character at a time to squasher, also inserting a semicolon into
-#    the stream between lines
-# squasher:  grabs characters from disassembler and passes them on to
-#    assembler, first replacing "**" with "^" and squashing runs of
-#    whitespace
-# assembler: grabs characters from squasher and packs them into lines
-#    with 72 character each, delivering each such line to putline;
-#    when it sees a null byte, passes the last line to putline and
-#    then kills all the coroutines
-# putline: grabs lines from assembler, and just prints them
-
-from Coroutine import *
-
-def getline(text):
-    for line in string.splitfields(text, '\n'):
-        co.tran(codisassembler, line)
-
-def disassembler():
-    while 1:
-        card = co.tran(cogetline)
-        for i in range(len(card)):
-            co.tran(cosquasher, card[i])
-        co.tran(cosquasher, ';')
-
-def squasher():
-    while 1:
-        ch = co.tran(codisassembler)
-        if ch == '*':
-            ch2 = co.tran(codisassembler)
-            if ch2 == '*':
-                ch = '^'
-            else:
-                co.tran(coassembler, ch)
-                ch = ch2
-        if ch in ' \t':
-            while 1:
-                ch2 = co.tran(codisassembler)
-                if ch2 not in ' \t':
-                    break
-            co.tran(coassembler, ' ')
-            ch = ch2
-        co.tran(coassembler, ch)
-
-def assembler():
-    line = ''
-    while 1:
-        ch = co.tran(cosquasher)
-        if ch == '\0':
-            break
-        if len(line) == 72:
-            co.tran(coputline, line)
-            line = ''
-        line = line + ch
-    line = line + ' ' * (72 - len(line))
-    co.tran(coputline, line)
-    co.kill()
-
-def putline():
-    while 1:
-        line = co.tran(coassembler)
-        print(line)
-
-import string
-co = Coroutine()
-cogetline = co.create(getline, test)
-coputline = co.create(putline)
-coassembler = co.create(assembler)
-codisassembler = co.create(disassembler)
-cosquasher = co.create(squasher)
-
-co.tran(coputline)
-print('done')
-
-# end of example