add HTML to linguist-vendored

[ghost]

pelican/.gitattributes

Lines 4 to 7 in 2eeff62

	# Improve accuracy of GitHub's Linguist-powered language statistics
	pelican/tests/content/* linguist-vendored
	pelican/tests/output/* linguist-vendored
	samples/* linguist-vendored

like this:

*.html linguist-vendored

since currently this looks like an HTML repo instead of a Python repo.

[justinmayer]

Thanks, Steven. The suggested solution seems like a blunt weapon, but it was also the only way I could find to adjust the statistics in any meaningful way. Perhaps there is a less-blunt way to address this problem, but until that time, it at least improves the situation in the interim.

For future reference: https://github.com/github-linguist/linguist/blob/master/docs/overrides.md