sub lei_rediff {
my ($lei, @inputs) = @_;
$lei->_lei_store(1)->write_prepare($lei);
- $lei->{opt}->{stdin} = 1 if !@inputs;
$lei->{opt}->{'in-format'} //= 'eml';
# maybe it's a non-email (code) blob from a coderepo
my $git_dirs = $lei->{opt}->{'git-dir'} //= [];