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82c67aa646
The changes done in this commit should help with the open issues: #5, #27 and #161. The old implementation lacked the NUL char at the end of the command, as defined on the Epson ESC/POS Reference Guide (see https://reference.epson-biz.com/modules/ref_escpos/index.php?content_id=53 ). Also, the horizontal tab control character (CTL_HT) shouldn't be there. This implementation allows setting up to 32 tabs with a given tab width. Both values are checked to be in the valid ranges defined on the guide. Also, the TabPosError exception text has been rewritten to define the stated above.