/usr/share/man/man3/ is in libedit-dev 3.1-20150325-1ubuntu2.
This file is owned by root:root, with mode 0o755.
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/usr/share/man/man3/editline.3edit.gz
/usr/share/man/man3/el_init.3
/usr/share/man/man3/el_source.3
/usr/share/man/man3/el_set.3
/usr/share/man/man3/el_tok_reset.3
/usr/share/man/man3/el_tok_end.3
/usr/share/man/man3/el_insertstr.3
/usr/share/man/man3/el_history_init.3
/usr/share/man/man3/el_tok_str.3
/usr/share/man/man3/el_push.3
/usr/share/man/man3/el_history_end.3
/usr/share/man/man3/el_deletestr.3
/usr/share/man/man3/el_line.3
/usr/share/man/man3/el_getc.3
/usr/share/man/man3/el_history.3
/usr/share/man/man3/el_get.3
/usr/share/man/man3/el_gets.3
/usr/share/man/man3/el_tok_line.3
/usr/share/man/man3/el_resize.3
/usr/share/man/man3/el_parse.3
/usr/share/man/man3/el_reset.3
/usr/share/man/man3/el_tok_init.3
/usr/share/man/man3/el_end.3