date_ical_parse_text() incorrectly uses str_replace()

date_ical_parse_text.patch queued for re-testing.

From the commit referenced in the main bug report:

- $line = array_pop($icaldata) . ($line);
+ // Trim up to 1 leading space from wrapped line per iCalendar standard.
+ $line = array_pop($icaldata) . (ltrim(substr($line, 0, 1)) . substr($line, 1));

I should have written that this change is needed because the extra space is now removed at the time of unfolding, and so the replace fails when trying to do this:

$data = str_replace(array("\r\n ", "\n ", "\r "), '', $data);

The patch removes the spaces from the ends of the match strings.