`y_offset` should not include any impact due to newlines '\n'

[kmatch98]

The y_offset is currently incorrectly calculated with the inclusion of a multiple related to the quantity of newlines '\n' in the text string.

However y_offset should be independent of the number of lines in the string, and should just be related to the glyph dimensions, since this acts as a baseline offset to the vertical center of the "M" glyph.

I observed this issue when calibrating text to the upcoming bitmap_label.py file.

[evaherrada]

@kmatch98 Good find. If you're up for it, a PR would be greatly appreciated.

[kmatch98]

Thanks @dherrada, please put this into my queue and I will figure it out. Also please note there will be a similar issue to resolve in the parallel library bitmap_label.py.

[kmatch98]

Closed with #86