`String#lines` with a block is deprecated style.
MODIFY
mrbgems/mruby-string-ext/src/string.c
mrbgems/mruby-string-ext/src/string.c
@@ -320,36 +320,16 @@ static mrb_value
mrb_str_lines(mrb_state *mrb, mrb_value self)
{
mrb_value result;
- mrb_value blk;
int ai;
mrb_int len;
- mrb_value arg;
char *b = RSTRING_PTR(self);
char *p = b, *t;
char *e = b + RSTRING_LEN(self);
- mrb_get_args(mrb, "&", &blk);
+ mrb_get_args(mrb, "");
result = mrb_ary_new(mrb);
ai = mrb_gc_arena_save(mrb);
- if (!mrb_nil_p(blk)) {
- while (p < e) {
- t = p;
- while (p < e && *p != '\n') p++;
- if (*p == '\n') p++;
- len = (mrb_int) (p - t);
- arg = mrb_str_new(mrb, t, len);
- mrb_yield_argv(mrb, blk, 1, &arg);
- mrb_gc_arena_restore(mrb, ai);
- if (b != RSTRING_PTR(self)) {
- ptrdiff_t diff = p - b;
- b = RSTRING_PTR(self);
- p = b + diff;
- }
- e = b + RSTRING_LEN(self);
- }
- return self;
- }
while (p < e) {
t = p;
while (p < e && *p != '\n') p++;

`String#lines` with a block is deprecated style.