Originally posted in PS of
http://sourceforge.net/mailarchive/message.php?msg_id=28130734

Copied here to be self-contained. Fix is attached.
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PS: Another thing that I've stumpled upon... I've found that in the log 
of the last command from above.
http://docs.python.org/reference/simple_stmts.html#grammar-token-assert_stmt
Should I put this into the bug tracker?

/home/hemmecke/scratch/roundup-git/local/lib/python2.7/site-packages/roundup/cgi/TAL/DummyEngine.py:82:

SyntaxWarning: assertion is always true, perhaps remove parentheses?
   assert (expression.startswith("$") and expression.endswith("$"),
/home/hemmecke/scratch/roundup-git/local/lib/python2.7/site-packages/roundup/cgi/TAL/DummyEngine.py:103:

SyntaxWarning: assertion is always true, perhaps remove parentheses?
   assert (expression.startswith("$") and expression.endswith("$"),
/home/hemmecke/scratch/roundup-git/local/lib/python2.7/site-packages/roundup/cgi/TAL/DummyEngine.py:165:

SyntaxWarning: assertion is always true, perhaps remove parentheses?
   assert (macroName.startswith("$") and macroName.endswith("$"),


(This is part of "git blame roundup/cgi/TAL/DummyEngine.py")
^43d208f (stefan 2009-02-09 17:47:12 +0000 102)     def evaluate(self, 
expression):
^43d208f (stefan 2009-02-09 17:47:12 +0000 103)         assert 
(expression.startswith("$") and expression.endswith("$"),
^43d208f (stefan 2009-02-09 17:47:12 +0000 104)             expression)

related to issue2550714 ?

Patch committed with rev4646.
The included TAL might be old, but there is no reason to not fix 
a simple issue as long as this is inside of roundup I guess.

Thanks Ralf!

@John: You are right that this issues fixes a part of
   Issue2550714