gff.pm has problemas when parsing Target attribute

[arremb]

gff.pm in 1.6 decodes strings in the wrong place, resulting in exception even if valid values.

GFF3 specification:

Target

Indicates the target of a nucleotide-to-nucleotide or protein-to-nucleotide alignment. The format of the value is "target_id start end [strand]", where strand is optional and may be "+" or "-". If the target_id contains spaces, they must be escaped as hex escape %20.

However, line 636 from gff.pm assigns a DECODED value to attr Target, converting valid %20 into spaces
So, Target='A%20B 1 23 +;' will be converted to $attr{'Target'} = 'A B 1 23 +' when it should keep the original value.
This brings problems when the value is parsed at line 706 (my ($t_id,$tstart,$tend,$strand,$extra) = split /\s+/, $target_string; ), resulting in an exception 'The value in the Target string, $target_string, does not conform to the GFF3 specification'