On Jun  1, 2009, Ralf Wildenhues <Ralf.Wildenhues@gmx.de> wrote:

> Hello Alexandre,
>> +    if ($t --help) 2>&1 | grep -e '--\[\?section-\]\?headers' > /dev/null; then

> \? is not portable BRE, but \{0,1\} should be.

Uhh.  Indeed.  Thanks for the reminder.  I ended up replacing \? with *,
which works fine for this purpose and is as portable as it gets.

Here's what I've just installed.