Description of usage for PDF creation incorrect

[rintisch]

In the README.md its said

$absolutepathToFile = $pdfService->saveToFile('myPdf.pdf'); (line 35)

This leads to a file named myPdf.pdf.pdf.

To it need to be

$absolutepathToFile = $pdfService->saveToFile('myPdf');

[rintisch]

I will create a pull request for this issue

[rintisch]

I realized that adding the file format (.pdf) is necessary when using the function $pdfService->saveToOutput (at least on Windows). Somehow is it removed in the download although the temporary file has the ending (which is added automatically by getFullTempFileName() in PdfSettings.php