suggestion: add a .ehs file type

[Isaac Dupree]

Alex Jacobson wrote:
> Ok, added as a feature request.
> 
> http://hackage.haskell.org/trac/ghc/ticket/1921#preview

this doesn't seem to say anything about perhaps let's have patchy 
ad-hoc-ness


>> Nevertheless, patchy and ad-hoc solutions are sometimes very 
>> convenient.  I certainly agree that messages of the form "bad 
>> programmer, you clearly meant X but you didn't *write* X; so go write 
>> X and then I'll compile your program" are tiresome.

not the style of ghc at all, but it could be less _tiresome_ if it asks 
"do you want me to add that to the file's language pragma?"  (which 
would make sense as an IDE's job, if we ever end up with one, I suppose)

Isaac