Expected Behavior

Using a line break or new line entry (shift-return or return) carries over to the invoice preview and generated PDF as displayed in the invoice creation view.

Current Behavior

@voltrue2 I think we should add some documentation for the validate method. I'm also happy to submit a PR for this. I'm receiving the following errors sometimes and it is unclear without investigating the code whether this means the request failed or if the receipt is invalid. In my particular case, both of these failures were for valid receipts.

{ Error: read ECONNRESET
    at TLSWrap.

This relates to the data file in issue #64.

We expect to get the text presented by esc2html in a HTML page (plus a pile of warnings), but instead it crashes with an ImagickException.

$ php esc2html.php examples/2019-10-ascii.txt  
WARNING: Unknown command DLE NUL
WARNING: Unknown command DLE �
WARNING: Unknown command DLE �
WARNING: Unknown command DLE �
WARNING: Unknown comm

2018-01-02 09:38:15,453 - FiscalberryApp - INFO - *** Websocket Server Started as HTTP at 127.0.1.1 port 12000***

2018-01-02 09:38:24,664 - FiscalberryApp - INFO - new connection


2018-01-02 09:38:32,857 - FiscalberryApp - INFO - ----- - -- - - - ---

2018-01-02 09:38:32,857 - FiscalberryApp - INFO - {"findAvaliablePrinters":""}

2018-01-02 09:38:32,857 - root - INFO - Iniciando pr