lei mail-diff: do not default to 'eml'

In retrospect, this doesn't make sense, since it needs at least
two messages to diff.  So go about "normal" input rules and
require users to specify the format.

diff --git a/lib/PublicInbox/LeiMailDiff.pm b/lib/PublicInbox/LeiMailDiff.pm
index b21a0c366fd68aa6c8198a99e7bbf5b7f9ea8cca..48ba74cfe886f1811aa078670491ebce8f44eb09 100644 (file)
--- a/lib/PublicInbox/LeiMailDiff.pm
+++ b/lib/PublicInbox/LeiMailDiff.pm
@@ -76,7 +76,6 @@ sub input_eml_cb { # used by PublicInbox::LeiInput::input_fh
 
 sub lei_mail_diff {
        my ($lei, @argv) = @_;
-       $lei->{opt}->{'in-format'} //= 'eml' if !grep(/\A[a-z0-9]+:/i, @argv);
        my $self = bless {}, __PACKAGE__;
        $self->prepare_inputs($lei, \@argv) or return;
        my $isatty = -t $lei->{1};