core/sys/windows/windows.d is executable

[Joseph Rushton Wakeling]

Hello all,

While updating my DMD/druntime/phobos install from git HEAD, I noticed that the 
druntime file core/sys/windows/windows.d has executable permissions.

Am I right to assume this is a mistake which probably stems from someone editing 
it _on Windows_, from whence all files seem to arrive on POSIX with executable 
permissions?

I'll file a bug report & patch, but first thought I'd check I wasn't mistaken 
about this being a mistake.

Thanks & best wishes,

     -- Joe