GitLab

Group Configs with no aggregation will print a empty space as the score for result table.
Example
```
|    Tasks     |Version|Filter|n-shot| Metric |   |Value |   |Stderr|
|--------------|-------|------|-----:|--------|---|-----:|---|-----:|
|group         |    N/A|      |      |        |   |      |   |      |
| - task 0     |Yaml   |none  |     0|acc     |↑  |0.4000|±  |0.0910|
| - task 1     |Yaml   |none  |     0|acc     |↑  |0.3333|±  |0.0875|
| - task 2     |Yaml   |none  |     0|acc     |↑  |0.2667|±  |0.0821|
| - task 3     |Yaml   |none  |     0|acc     |↑  |0.3333|±  |0.0875|
```

So the `v` variable in the `make_table` needs to check if the value is a float or a string.