doc comments on function parameters without a trailing comma causes invalid code after formatting

[xdBronch]

Zig Version

0.12.0-dev.1680+be6f76655

Steps to Reproduce and Observed Behavior

// fmt.zig
fn foo(
    /// uh oh no comma
    _: void
) void {}

$ zig fmt fmt.zig
fmt.zig
$ cat fmt.zig
fn foo(/// uh oh no comma
_: void) void {}
$ zig fmt fmt.zig
fmt.zig:1:8: error: same line documentation comment
fn foo(/// uh oh no comma
       ^~~~~~~~~~~~~~~~~~

Expected Behavior

zig fmt should keep the doc comment on a separate line or issue an error immediately rather than generating invalid code insert a trailing comma to keep the lines separate

[xdBronch]

on structs

// fmt.zig
const Foo = struct {
    /// uh oh no comma
    _: void
};

zig fmt actually inserts a trailing comma after the field so i suppose that should be the behavior for functions as well