Successor to PR #3523. There are 494 single-line changes (`public function provider` to `public static function provider`) in this PR. None of these were made manually; they were all created with the following script (adapted from
https://stackoverflow.com/questions/25909820/how-to-recursively-iterate-through-files-in-php):
```php
$dir = 'C:/git/unit10prep2/tests/PhpSpreadsheetTests';
$it = new RecursiveDirectoryIterator($dir);
// Loop through files
foreach(new RecursiveIteratorIterator($it) as $file) {
if ($file->getExtension() === 'php') {
$contents = file_get_contents($file);
$new = preg_replace('/public function (\\w*)([Pp])rovider/', 'public static function $1$2rovider', $contents);
if ($new !== $contents) {
echo "changing $file\n";
file_put_contents($file, $new);
}
}
}
```
After this PR, there will be one more, with a small number of test changes, and enabling PhpUnit 10 for Php 8.1+.
* Prevented reading of blank cells.
The "readEmptyCells" attribute is ignored when reading spreadsheets, resulting in memory bloat.
* Included a test file for Unit Testing
A file that contains 100 referenced cells, one of which contains data.
* New test file for reading in empty cells
* Added test for reading in a blank cell
* Updated CHANGELOG
* Changed "s to 's
Change required for code style compliance
* Further Code Style Changes
Removed spaces after variable, before array indices.
* Further Code Style Changes
* Further Code Style Changes
Removed additional spaces.
* Updated reader and tests.
oleibman
Adrien Crivelli
Mark Baker
phinor