neilconway opened a new issue, #10865:
URL: https://github.com/apache/arrow-rs/issues/10865
### Describe the bug
Formatting a decimal with negative scale pads the digit string with
`|scale|` zeros; for a value of zero this yields an output like "000". Aside
from being odd, this is also an illegal JSON number (the JSON spec forbids
leading zeroes).
### To Reproduce
```rust
use arrow_array::{ArrayRef, Decimal128Array, RecordBatch};
use std::sync::Arc;
let a = Decimal128Array::from(vec![0, 12])
.with_precision_and_scale(10, -2)
.unwrap();
a.value_as_string(0); // "000" — expected "0"
a.value_as_string(1); // "1200", correct
let batch = RecordBatch::try_from_iter([("c", Arc::new(a) as
ArrayRef)]).unwrap();
let mut buf = Vec::new();
let mut w = arrow_json::LineDelimitedWriter::new(&mut buf);
w.write_batches(&[&batch]).unwrap();
w.finish().unwrap();
String::from_utf8(buf).unwrap();
// {"c":000} <- invalid JSON number
// {"c":1200}
```
### Expected behavior
_No response_
### Additional context
_No response_
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