Robuta

https://www.mail-archive.com/bug-groff@gnu.org/msg13322.html

[bug #67735] [long-term] use "unsigned char" for troff's internal character type with militant...

long term unsigned char bug use troff

https://www.boost.org/doc/libs/1_85_0/doc/html/boost/property_tree/customiz_1_3_31_10_9_1_1_6.html

Struct template customize_stream

unsigned char struct template customize stream