Just noticed that the (excellent) C3 array editor inserts dozens of whitespaces after/before every character in the relevant json file- this can be easily noticed simply downloading the edited json file (or exporting it with the whole C3 project) and opening it with notepad or any text editor.
I 'm not a tech guy, so maybe this is perfectly normal, but none of the other arrays editor I know behave this way.
The exported file is, of course, perfectly correct & working - but it has become hardly readable / manually editable
(quite annoying but ok, only for some use).
Another (perhaps worse) drawback is that file seems to has become much bigger: I imported in C3 a json file related to a medium bidimensional array [100, 5, 1], almost empty (size: 2.5 KB), edited just one cell, downloaded the json file, and it had become 25 kb (26 kb in the exported apk).
This maybe not totally negligible for projects with many and/or big arrays.
If anyone is interested, the quickiest workaround I found is to open the exported files with Notepad++, then run its "Replace" function with parameters:
Search Mode = Regular Expression
Find What = ^/S*
Replace With =blank.
This deletes all the whitespaces restoring the "normal" aspect of the file and its size - works perfectly to me.
After this, you can reimport the file on C3.