Hello all,
We have revised the behaviour of some commalist functions, making the
treatment of spaces and braces more consistent.
Spaces are now stripped from items when they are added to a clist, while
braces are retained. Thus
\clist_put_left:Nn \l_my_clist { a , ~ b ~ , { c } , ~ { ~ d ~ } ~ }
will add the items "a", "b", "{c}" and "{~d~}" to the clist.
The mapping functions for 'inline' clists, for example
\clist_map_function:nN, strip spaces in the same way, so that
\clist_map_function:nN { a , ~ b ~ , { c } , ~ { ~ d ~ } ~ } \foo:n
will result in \foo:n being mapped to "a", "b", "{c}" and "{~d~}".
As a result of these alterations, \clist_trim_spaces:N is deprecated,
and scheduled for removal by 20120905. \clist_trim_spaces:n is moved
to an internal function only: it should therefore be regarded as
deprecated with respect to use outside of the kernel.

Joseph Wright
