reinplace instruction and automatic line feeds

[Nicolas Pavillon]

> Don’t do this reinplacement on binary files.
> 
> https://trac.macports.org/ticket/35581
> 
Sure, that was my intent when noticing it, but I was still wondering about the best way of doing it, as filtering by file extension could have been cumbersome and possibly not reliable. 
I was however not aware of that ticket. 

Anyway, following the suggestion of Josh, it seems after checking that this is not necessary anymore with present versions, hence the deletion of the full block of instructions in r115590.

Cheers, 

Nicolas