ocr-numbers: implement error object
ocr-numbers: implement error object

per #1311
ocr-numbers: remove redundant comment

per @Insti's suggestion.
ocr-numbers: add clarity to error messages

per @Insti suggestion.
ocr-numbers: improved wording of error messages


jmluy/x-common,exercism/x-common,jmluy/x-common,rpottsoh/x-common,rpottsoh/x-common,ErikSchierboom/x-common,jmluy/x-common,exercism/x-common,petertseng/x-common,ErikSchierboom/x-common,petertseng/x-common