samg/diffy — pull request #17 by siyusong (2012-12-16 08:32:41+00:00)
Title: hide possible STDERR output

`which diff.exe` is guaranteed to fail on linux, producing message like this:

which: no diff.exe in (/home1/s/siyusong/.rvm/gems/ruby-1.9.3-p194/bin:/home1/s/siyusong/.rvm/gems/ruby-1.9.3-p194@global/bin:/home1/s/siyusong/.rvm/rubies/ruby-1.9.3-p194/bin:/home1/s/siyusong/.rvm/bin:/usr/local/ghc-7.0.4/bin/:/usr/lib64/mpi/gcc/openmpi/bin:/home1/s/siyusong/bin:/usr/local/bin:/usr/bin:/bin:/usr/bin/X11:/usr/X11R6/bin:/usr/games:/usr/lib/mit/bin:/usr/lib/mit/sbin:/usr/lib/qt3/bin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:/opt/kde3/bin:/opt/gnome/bin:/home1/s/siyusong/bin:/home1/s/siyusong/.cabal/bin:/home1/s/siyusong/.rvm/bin:/home1/s/siyusong/.rvm/usr:/home1/s/siyusong/subl:/home1/s/siyusong/android-sdk-linux/platform-tools:/home1/s/siyusong/android-sdk-linux/tools:.:/home1/s/siyusong/.opt/bin)

Hiding the STDERR output could make the output tidier.