improve error message

diff --git a/IkiWiki/Plugin/img.pm b/IkiWiki/Plugin/img.pm
index 78e3789171c53a5e90110f666e08ef0860bd36f7..44d67bd8375057e77d5853ee93cdd7943108ed14 100644 (file)
--- a/IkiWiki/Plugin/img.pm
+++ b/IkiWiki/Plugin/img.pm
@@ -66,7 +66,7 @@ sub preprocess (@) {
 
        if ($params{size} ne 'full') {
                my ($w, $h) = ($params{size} =~ /^(\d*)x(\d*)$/);
-               error sprintf(gettext('bad size "%s"'), $params{size})
+               error sprintf(gettext('wrong size format "%s" (should be WxH)'), $params{size})
                        unless (defined $w && defined $h &&
                                (length $w || length $h));