twitter/bootstrap — pull request #2066 by artstorm (2012-02-18 13:34:43+00:00)
Title: Fixed compile problem with LESS 1.2.1.

The sprite path variables introduced in v2.0.1 prevents bootstrap.less to
compile with LESS v1.2.1. Updated the variables to use the @{name}
construct in sprites.less, as outlined in the LESS documentation. This
change makes the LESS files compile with LESS v1.2.1.