cspace
void cspace(SPACE *, const char *, size_t, enum e_spflag);
cspace(sp, p, len, spflag);
cspace(&PS, hs, hsl, REPLACE);
cspace(&PS, "\n", 1, APPEND);
cspace(&PS, hs, hsl, APPEND);
cspace(&HS, ps, psl, REPLACE);
cspace(&HS, "\n", 1, APPEND);
cspace(&HS, ps, psl, APPEND);
cspace(&PS, "\n", 1, APPEND);
cspace(&HS, "", 0, REPLACE);
cspace(&HS, "", 0, REPLACE);
cspace(&SS, s, match[0].rm_so - le, APPEND);
cspace(&SS, s, match[0].rm_eo - le,
cspace(&SS, s++, 1, APPEND);
cspace(&SS, s, slen, APPEND);
cspace(&YS, &c, 1, APPEND);
cspace(&YS, y->multis[i].to,
cspace(&YS, p, 1, APPEND);