bug#56357: Request for font size adaptation that fits window

[carlmarcos]

I am basically an old fart who cannot read small fonts anymore.  Could you think of a way to automatically maximise the font size. 

Suppose a user uses a 13 pt font size.  Let there be some space between the longest line in the buffer and the edge of the window.  It would be super if the font size could be automatically increased, such that the difference between the longest line and the window size in minimised.

Many thanks for reading this.