GitHub detects .d source as Makefile?

[Seb via Digitalmars-d-learn]

On Saturday, 18 March 2017 at 01:33:13 UTC, David Nadlinger wrote:
> On Saturday, 18 March 2017 at 00:34:57 UTC, XavierAP wrote:
>> Is this a known issue with D on GitHub? Should I report it I 
>> guess?
>> How smart is GH that it doesn't look at the file extension? 
>> What happened?
>
> The extension .d can legitimately refer to makefiles as well 
> (specifically, to dependency files).
>
> The code GitHub uses to infer source file languages is 
> open-source, and – fittingly – available on GitHub: 
> https://github.com/github/linguist
>
> You should check the issues for reports of similar D-related 
> problems, and if there are none, create a new one. Or, better 
> yet, submit a pull request with an appropriate fix.
>
> As a workaround, adding a "module …;" declaration to your file 
> should help. You probably want to be doing that anyway.
>
>  — David

FWIW this has been fixed by Martin last summer, but the people at 
GitHub aren't very responsive. The PR is still pending :/
More info:

https://trello.com/c/g9PB3ISG/233-improve-d-language-recognition-on-github
https://github.com/github/linguist/pull/3145