We need better documentation for functions with ranges and templates

[Adam D. Ruppe via Digitalmars-d]

Just something I want to throw out as a reminder, a part of the 
ranges chapter of my book is public on the packt website:

https://www.packtpub.com/books/content/ranges

and a longer things from Mike Parker's book is too:

https://www.packtpub.com/books/content/understanding-ranges

a lot of us have talked about ranges, it all ought to be nicely 
referenced in the docs as much as we can.