[Lenny400] Letux 400 wiki page broken

[H. Nikolaus Schaller]

> Am 20.04.2018 um 19:29 schrieb H. Nikolaus Schaller <hns at goldelico.com>:
> 
> 
>> Am 20.04.2018 um 19:21 schrieb Paul Boddie <paul at boddie.org.uk>:
>> 
>> On Friday 20. April 2018 18.53.02 H. Nikolaus Schaller wrote:
>>> 
>>>> Am 20.04.2018 um 16:41 schrieb Paul Boddie <paul at boddie.org.uk>:
>>>> 
>>>> Sorry, but I think I managed to break one of the wiki pages on the
>>>> documentation site:
>>>> 
>>>> http://projects.goldelico.com/p/letux400/page/GPIO/
>>> 
>>> seems to be a bug in the MarkDown parser of Indefero triggered by content.
>> 
>> [...]
>> 
>>> So it seems to have something to do with table header formatting.
>> 
>> I think I forgot to put a column separator in the row separator line:
>> 
>> """
>> Port | Pins           | Function | Peripheral
>> ----------------------|----------|---------------------
>> """
>> 
>> Spot the problem! Here's the correct version:
>> 
>> """
>> Port | Pins           | Function | Peripheral
>> -----|----------------|----------|---------------------
>> """
> 
> Ah, interesting. Yes, something like this could make a problem.
> 
>> 
>>> And most likely Indefero was developed / tested on a system where an
>>> undefined offset index did not raise errors.
>> 
>> It's PHP, so I guess that some mode or other was enabled or disabled.
> 
> Or after some upgrade of PHP it became more strict.
> 
>> 
>>>> Fortunately, I have a copy of the text that I wanted to save, but I think
>>>> the server gave up on storing the page (or even previewing it), and now
>>>> it won't even show the page any more.
>>> 
>>> Maybe I can patch / fix the problem in Indefero or at least make it
>>> not fail completely.
>> 
>> The quick but annoying solution is to edit the page text, perhaps. Sorry to 
>> make work for you, though!
> 
> No problem. Bugs must be fixed or trouble may some day become bigger than just
> fixing them :)

Ok, I have simply added an isset() check to substitute an empty string.
Now the page can be loaded. Please check.

And thanks for taking the effort to update those wiki pages!

BR,
Nikolaus