Understanding Github's Language Calculations

Ever noticed this at the top of a Github repo?

This filetype percentage is calculated by Github's Linguist project.

There's just one problem: 'Today I Learned' isn't a JavaScript project; it's a Rails application. I would expect the majority of the files to be Ruby files. Labeling 'Today I Learned' a JavaScript project misrepresents it to the Github community.

I found several techniques to correct the Linguist evaluation; this pull request explains one I tried in greater detail.

My solution? Once I moved some vendored JS files into a directory with a name that Linguist ignores (ace-builds/), the calculation started to look like a Rails app.

Here's the updated header:

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