The previous version wasn’t matching the Rails Guides logo source file
listed at https://github.com/rails/homepage/blob/master/materials/rails_guides_logo.psd
somehow. It was also a GIF when an 8-bit PNG results in a smaller file (2KB vs 4KB) which
should be just as widely compatible with browsers.
And that’s just for the 1x version. I added a new 2x version for “retina” or high-density
displays and a CSS @media query to progressively enhance with this high density
version of the logo. I’ve ensured that this query is supported across browsers by
using vendor-specific versions when necessary. See:
https://caniuse.com/#feat=css-media-resolution
[ci skip]
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