\group_begin:
\char_set_catcode:nn{`\=}{13}
\char_set_catcode:nn{`\,}{13}
\char_set_lccode:nn{`\8}{`\=}
\char_set_lccode:nn{`\9}{`\,}
\tl_to_lowercase:n{\group_end:
\cs_new_protected_nopar:Npn \KV_sanitize_outerlevel_active_equals:N #1{
\tl_replace_all_in:Nnn #1 = 8
}
\cs_new_nopar:Npn \KV_sanitize_outerlevel_active_commas:N #1{
\tl_replace_all_in:Nnn #1 , 9
}
}
\group_begin:
\char_set_catcode:nn{`\Q}{3}
\cs_new:Npn\KV_remove_surrounding_spaces:nw#1#2\q_nil{
#1{\KV_remove_surrounding_spaces_auxi:w \exp_not:N#2Q~Q}
}
（l3keyval.sty [1890 2010-04-11 03:37:15Z] 91 行目）
