Docs: Section on local variables

[Nick Sabalausky]

"Timon Gehr" <timon.gehr at gmx.ch> wrote in message 
news:jmrnlo$22p$1 at digitalmars.com...
> On 04/20/2012 01:04 PM, bearophile wrote:
>> Andrej Mitrovic:
>>
>>> I think these features probably belong to some lint-type tool and not
>>> the compiler.
>>
>> On the contrary, I hope to see them implemented in the D front-end.
>> I've seen again and again that people don't even use warnings, so I don't
>> think many of them use lints.
>> This means, tests should be built-in and
>> active on default (this means I'd like D informational warnings to be
>> active on default, and be disabled with a compiler switch!).
>>
>
> I don't usually use warnings because of this issue:
> http://d.puremagic.com/issues/show_bug.cgi?id=6552

Since implicit fallthrough is going away, that's more a problem with a 
*missing* warning (in the second example) rather than an erroneous warning. 
So not using warnings doesn't solve that, it just makes all the rest of the 
warnings go missing, too.