Row mismatch in CSV

[Jesse Phillips]

I'm adding output to the std.csv module that will be available in 
the next release and I'm hoping I can get an opinion on this.

The last stated rule for CSV is:

Each record should contain the same number of fields (not 
enforced)

I didn't enforce this as I don't see it likely to be indicating 
an error. But I have found that not following this and parsing 
with a struct will cause incorrect results.

one,two
three
four

Will parse as

one,two
three,two
four,two

So I can easily fix this by setting my internal struct with 
.init. I like this.

A goal I am going for with csvWriter is, what goes in comes out. 
But in this case your output would be

one,two
three,
four,

Which I like as it is correct, but it isn't the original input. 
So the only why to achieve these goals together is to not allow 
the initial invalid input... Thoughts?