twitter/bootstrap — pull request #8165 by sgmcb (2013-06-13 08:34:59+00:00)
Title: Rename responsive breakpoint variables

Rename the variables that set the responsive media-query breakpoints to use the v3 naming scheme (e.g. screen-sm, screen-md, etc) and remove redundant v2 names (e.g. screen-tablet).

Updates the breakpoint names in variables.less to make clear how the bounds for each screen size are being set.

(Makes no functional change to output.)