Non-beautiful space in front of sizes in arguments block

Hi,
thanks for keeping up the good work on this useful tool! One concerning the arguments block: The code
```
arguments
varname (2, 2) double
end
```
is changed into
```
arguments
varname(2, 2) double
end
```
which is not "beautiful" if you ask me. I know where this comes from - the numbers are interpreted as indices. However, in this context, they are a description of the expected size of the matrix. I think keeping the space there would make the code more beautiful.

Thanks for considering,

Florian