JohnLangford/vowpal_wabbit — pull request #405 by Jaimyoung (2014-09-24 08:11:34+00:00)
Title: Make them work on Mac OSX, by using "gunzip -c" instead of zcat

zcat on OS X always appends a .Z to the filename, hence better to use "gunzip -c"
This is ugly but the alternative (aliasing the user's OSX zcat to gzcat) is even uglier.