[PATCH 2 of 3 V2] shelve: refactor option combination check to add new one easily

[FUJIWARA Katsunori]

At Sat, 05 Jul 2014 23:01:20 +0200,
Pierre-Yves David wrote:
> 
> 
> 
> On 06/07/2014 12:07 PM, FUJIWARA Katsunori wrote:
> > BTW, "preceding" doesn't have any specific connotation, does it ?  or
> > is another word appropriate as the antonym of "following" ?
> 
> Evolution terminology is:
> 
>    Successor - precursor
>    Succeed - precede

OK, I'll use "following <=> previous" or so for patch description,
instead of "succeeding <=> preceding",

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[FUJIWARA Katsunori]                             foozy at lares.dti.ne.jp