White space affecting parsing of range values

Hi,

I noticed I'm getting an error when adding white space to a numeric
range. I can run this:

postgres=# SELECT 5::numeric <@ '(,10]'::numrange;
?column?
----------
t
(1 row)

But I can't run this:

postgres=# SELECT 5::numeric <@ '( ,10]'::numrange;
ERROR: invalid input syntax for type numeric: " "
LINE 1: SELECT 5::numeric <@ '( ,10]'::numrange;
^
If one had constructed a series of ranges, and wanted to line them up
vertically for easy comprehension, this wouldn't be possible.

This doesn't seem to be a problem with regular numeric values:

postgres=# SELECT ' 3 '::numeric;
numeric
---------
3
(1 row)

Shouldn't white space be ignored in range values?

--
Thom