TZUTC: -0700
MSGID: 58731.sync_sys@1:103/705 2d5bfa09
PID: Synchronet 3.21a-Linux master/88b423313 Sep 29 2025 GCC 12.2.0
TID: SBBSecho 3.30-Linux master/88b423313 Sep 29 2025 GCC 12.2.0
BBSID: VERT
CHRS: UTF-8 4
FORMAT: flowed
https://gitlab.synchro.net/main/sbbs/-/issues/991#note_7745

Every time this script runs, an extra blank line is added before \[second\]...
not setting the section separator makes the issue go away:

```javascript
var f = new File(js.exec_dir + 'test.ini');

if(f.open(f.exists ? 'r+':'w+')) { f.ini_section_separator = '';
f.iniReplaceObject = function(sec, obj) { this.iniRemoveSection(sec);
this.iniSetObject(sec, obj); };

    f.iniSetObject('first', {key1:'val1',key2:'val2'});
    f.iniReplaceObject('second', {key1:'val1',key2:'val2'});
    f.close();

}
```
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