love.filesystem.append and love.filesystem.getSize?
I noticed that File objects can be opened in append mode and have a getSize method, but these things can't be done with love.filesystem functions.
Would it be useful to have
love.filesystem.append(filename, string) and
love.filesystem.getSize(filename) as well?
Edit: I guess this already gets the size of a file:
_, size = love.filesystem.read('file.txt')
Another edit: But I assume that would take longer, because it's being read.