Scientific Format Mask ignores decimal setting

[MarkBaker]

This is:

- [X] a bug report
- [ ] a feature request
- [ ] **not** a usage question (ask them on https://stackoverflow.com/questions/tagged/phpspreadsheet or https://gitter.im/PHPOffice/PhpSpreadsheet)

What is the expected behavior?

A Scientific Number Format Mask such as '0.000E+00' will render the required number of decimal places. (in this case, 3dp)

What is the current behavior?

The Scientific Number Format Mask only renders 2 decimal places

What are the steps to reproduce?

Please provide a Minimal, Complete, and Verifiable example of code that exhibits the issue without relying on an external Excel file or a web server:

<?php

require __DIR__ . '/vendor/autoload.php';

// Create new Spreadsheet object
$spreadsheet = new \PhpOffice\PhpSpreadsheet\Spreadsheet();
$worksheet = $spreadsheet->getActiveSheet();

$worksheet->getCell('A1')->setValue(-12345.67890);
$worksheet->getCell('A1')
    ->getStyle()->getNumberFormat()
    ->setFormatCode('0.000E+00');

// Expected result: -1.235E+4
// Actual result: -1.24E+4
var_dump($worksheet->getCell('A1')->getFormattedValue());

If this is an issue with reading a specific spreadsheet file, then it may be appropriate to provide a sample file that demonstrates the problem; but please keep it as small as possible, and sanitize any confidential information before uploading.

What features do you think are causing the issue

• Reader
• Writer
• Styles
• Data Validations
• Formula Calculations
• Charts
• AutoFilter
• Form Elements

Does an issue affect all spreadsheet file formats? If not, which formats are affected?

Yes

Which versions of PhpSpreadsheet and PHP are affected?

All