The importmulti help text reads, in part: 

```
{                                                          (json object) If a ranged descriptor is used, this specifies the start and end of the range to import
           "start": n,                                              (numeric, optional, default=0) Start of the range to import
           "end": n,                                                (numeric, required) End of the range to import (inclusive)
},
```

This is a value for which a key is missing; it should be "range": { ...
{
        std::string ret;
        const size_t pad = m_max_pad + 4;
        for (const auto& s : m_sections) {
            if (s.m_right.empty()) {
                ret += s.m_left;
                ret += "\n";
                continue;
            }
            std::string left = s.m_left;
            left.resize(pad, ' ');
            ret += left;
            
            std::string right;
            size_t begin = 0;
            size_t new_line_pos = s.m_right.find_first_of('\n');
            while (true) {
                right += s.m_right.substr(begin, new_line_pos - begin);