This break sub-match references.

echomsg substitute('2013-06-27${0}', 
'\%#=0\\\@<!\${\(\d\+\%(:.\{-}\)\?\\\@<!\)}', ' \1 ', 'g')
E43: Damaged match string
2013-06-27 0}

echomsg substitute('2013-06-27${0}', 
'\%#=1\\\@<!\${\(\d\+\%(:.\{-}\)\?\\\@<!\)}', ' \1 ', 'g')
2013-06-27 0

-- 
-- 
You received this message from the "vim_dev" maillist.
Do not top-post! Type your reply below the text you are replying to.
For more information, visit http://www.vim.org/maillist.php

--- 
You received this message because you are subscribed to the Google Groups 
"vim_dev" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to [email protected].
For more options, visit https://groups.google.com/groups/opt_out.


Raspunde prin e-mail lui