fixing printChar() so that shift functions can move characters printed by printChar

[cchuneke]

added a line that assigns the input of printChar() to the local RAM, to allow shiftLeft() and shiftRight() to work on characters printed with printChar().

[sfe-SparkFro]

Thanks for this!

I created #27 to track this, as it looks like there's other places where displayContent needs to be corrected, such as in clear(). If you'd like to fix those as well, that would be great! Otherwise we will try to get around to it when we can.

[cchuneke]

Sure! I missed #27 when looking at the issues somehow, and I'm also surprised I didn't find any of the other problems while I was working with the library. I'll see what I can and can't fix myself.

[sfe-SparkFro]

I missed #27 when looking at the issues somehow

I created it after you created this PR, just so we can track it properly 🙂

I'll see what I can and can't fix myself

Thanks!

[cchuneke]

I don't actually have one of the displays to test things on myself (only have one at work since I used it for a work project), but I think this will fix the issue with clear(). There is another loop in size_t HT16K33::write(const uint8_t *buffer, size_t size) that clears displayRAM the same way clear() does, but given the rest of the function I'm not sure that displayContent needs to be cleared there too.