automatically verifying code samples in phobos docs

[Laeeth Isharc via Digitalmars-d-learn]

Should this be done?  How?

I sent a pull request for the std.net.curl docs.  They all talk 
about assigning the results of web requests to strings, but at 
least on my setup this does not work (cannot assign char[] to 
string).  I was trying to walk someone else through using this 
and it was confusing.

  Error: cannot implicitly convert expression 
(get("http.dlang.org", AutoProtocol())) of type char[] to string

BTW I don't know why you can't convert a char[] to string - seems 
harmless enough conversion that way around.

Pull request here (I haven't had time to check properly).

https://github.com/D-Programming-Language/phobos/pull/3564