Ask HN: Please increase the width of expand/collapse button

I browse HN several times a day on my mobile phone. It is difficult for me to collapse and expand the comments to reach the last read comment after a few hours.

More than half the time I can't tap on the Toggle anchor, and when I do, I accidentally tap on the timestamp instead of the [-] or [+].

I think adding a space around - and + would save me (and probably many others) a lot of frustration.

NB: Ask HN, because I am also looking for feedback from the community. Thanks!