msi: Tweak msiexec's usage message.

[Frédéric Delanoy]

On Fri, May 4, 2012 at 3:21 PM, Francois Gouget <fgouget at free.fr> wrote:
> On Fri, 4 May 2012, Julian Rüger wrote:
>
>> Hi Francois and wine-devel,
>>
>> while we're at it, shouldn't these
>>
>> >"Advertise a product:\n"
>> >"\t/j[u|m] package [/t transform] [/g languageid]\n"
>> >"Apply a patch:\n"
>> >"\t/p patch_package [property]\n"
>> >"\t/p patch_package /a package [property]\n"
>>
>> also be put in curly brackets?
>>
>> Like this:
>>
>> \t/j[u|m] {package} [/t transform] ...
>> \t/p {patch_package} [property]\n
>> ...
>
> My understanding is that for msiexec the curly brackets are only used to
> enclose cases where there is two or more alternatives: {a|b|c}. With
> {required parameter} being an exception to the rule, maybe because it in
> fact represents a list.
>
> It would be nice if all of Wine's tools used the same conventions for
> the usage messages.

The msiexec conventions look sane to me: [ ] for optional and { } for
mandatory parameters (*only* when a choice/list is involved). It's
also what's used in other wine commands "/?" results (e.g. 'start',
'ipconfig', 'regedit', etc.).

Frédéric