ref: a0dae6465a05c0f680bd88e3fcef97dc73a110a4 dir: /sys/src/cmd/unix/drawterm/libc/runestrcat.c/
#include <u.h> #include <libc.h> Rune* runestrcat(Rune *s1, Rune *s2) { runestrcpy(runestrchr(s1, 0), s2); return s1; }