+use URI::Escape qw(uri_escape_utf8);
+use PublicInbox::MID qw/mid_clean/;
+use base qw/Exporter/;
+our @EXPORT_OK = qw/ascii_html/;
+
+# for user-generated content (UGC) which may have excessively long lines
+# and screw up rendering on some browsers. This is the only CSS style
+# feature we use.
+use constant STYLE => '<style>pre{white-space:pre-wrap}</style>';
+use constant PRE => "<pre\nstyle=\"white-space:pre-wrap\">"; # legacy