github/linguist — pull request #740 by danluu (2013-10-26 19:06:21+00:00)
Title: Add common VHDL file extensions

Many common VHDL file extensions aren't listed. `.vhd` is the main one, but there are others. See http://www.xilinx.com/support/answers/22777.htm for a list of VHDL extensions.