Bug 413648: Attachment mime type handling should strip leading and trailing spaces

Bugzilla/Attachment.pm

@@ -511,6 +511,7 @@ sub _check_content_type {
     my ($invocant, $content_type) = @_;
 
     $content_type = 'text/plain' if (ref $invocant && $invocant->ispatch);
+    $content_type = trim($content_type);
     my $legal_types = join('|', LEGAL_CONTENT_TYPES);
     if (!$content_type or $content_type !~ /^($legal_types)\/.+$/) {
         ThrowUserError("invalid_content_type", { contenttype => $content_type });