tabatkins/css-preprocessor — pull request #4 by SimonSapin (2013-06-27 14:30:00+00:00)
Title: Sort references by short name

The previous code relied on the (undefined) iteration order of sets. (I happened to get a different order on css-syntax.)

The sorting criteria is kind of arbitrary. It could be by order of first reference, or anything we know about the refs.