String#b

static VALUE
rb_str_b(VALUE str)
{
    VALUE str2;
    if (FL_TEST(str, STR_NOEMBED)) {
        str2 = str_alloc_heap(rb_cString);
    }
    else {
        str2 = str_alloc_embed(rb_cString, RSTRING_EMBED_LEN(str) + TERM_LEN(str));
    }
    str_replace_shared_without_enc(str2, str);
    ENC_CODERANGE_CLEAR(str2);
    return str2;
}