Update README.md

[GabrieleRomeo]

I've added the single var pattern specification. It may be helpful if anybody wants to use this declaration style.

[jllodra]

Hi @GabrieleRomeo,

I am not sure whether we should permit 2 different specifications for variable declaration or not.

I personally think the one variable per line and ; approach is much better.
You will never have to swap a ; for a , and vice-versa.

[GabrieleRomeo]

Hi @jllodra

I am not sure whether we should permit 2 different specifications for variable declaration or not.

I know it may be a point of confusion for someone, but I like the idea of grouping variables by group separated by a new line.

Probably you are right, but this style has its charms. 😸