RE: master 97cb255: newcomment.el (comment-line): New command on C-x C-; .

[Drew Adams <drew.adams@oracle.com>]

> Yes, I did give it a try and it was a conscious decision, but let me start by saying I didn't put a huge amount of thought into it. 
> There were three factors that made me choose this:
> 1. Reversing direction while going up can also be done by just hitting some harmless key like C-a (for this particular command, C-a is harmless). That takes the same number of keys as C-- and has the same effect. In some cases (when you're moving one line at a time), `undo' will also do what you want with even less keys. 
> 2. A good portion of users won't expect it to behave like that (even if it's written in the doc). This also applies to the current version, but see below. 
> 3. Unlike the current "persistent negative argument effect", this "reverse direction twice" functionality seems like it would come up very rarely, probably less than the number of times it would catch someone by surprise. 
> Combine 3 with the fact that it has perfectly plausible alternatives for those instances when it does come up, and that's I why I decided this way. 
> As I said, I just thought of this very briefly. Items 2 and 3 are really just hunches.

Like I said:

>> It won't be the first time I will have my own local version of
>> something.