The canonical notation is like this:

  func(arg1, arg2, arg3)

the first example splits it across multiple lines in a way which maximally preserves the other aspects of the notation.

The argument is already being muddled with the function in the same way.

These conventions are seen in the wild:

  func (arg1, arg2, arg3)

and

  func( arg1, arg2, arg3 )

The real fix for that muddling is to drop the commas, and move the parenthesis to include the function:

  (func arg1 arg2 arg3)

Now func and arg1 are no more or less muddled than are arg1 and arg2. :)

> the first example splits it across multiple lines in a way which maximally preserves the other aspects of the notation.

Once you’re splitting it across lines I don’t think that is a desirable attribute. Better to use a format that suits multiple lines than attempt to match as closely as possible to a format intended for one line. Like those “flying cars” that try to look like the “canonical” car.

From my perspective this is a UI problem (though not a serious one).