Origins of the D Programming Language

[Les De Ridder]

On Sunday, 1 September 2019 at 00:03:20 UTC, Andrei Alexandrescu 
wrote:
> We have made good progress on our submission, in particular 
> Mike got to use his literary gift some more. Our latest draft 
> is here:
>
> https://erdani.com/hopl2020-draft2.pdf
>
> We would love some feedback, corrections, and historical 
> details. Thanks!

Line 829 should say `haystack.length` instead of `needle.length`.
Again on line 837 (or 838?).

Nitpicking a little, but maybe use D style for the code examples
(spaces after control keywords, Allman brace style, etc.)?