moreutils and task-spooler conflict

Fixes Homebrew/homebrew#16850.

Formula/moreutils.rb

@@ -9,6 +9,9 @@ class Moreutils < Formula
   conflicts_with 'parallel',
     :because => "both install a 'parallel' executable."
 
+  conflicts_with 'task-spooler',
+    :because => "both install a 'ts' executable."
+
   def install
     # Building the man pages requires DocBook, so we skip them.
     scripts = %w[chronic combine ts vidir vipe zrun]

Formula/task-spooler.rb

@@ -5,6 +5,9 @@ class TaskSpooler < Formula
   url 'http://vicerveza.homeunix.net/~viric/soft/ts/ts-0.7.3.tar.gz'
   sha1 '33b9321d4f48a2c2685a8240db4e00c0e69ef9bc'
 
+  conflicts_with 'moreutils',
+    :because => "both install a 'ts' executable."
+
   def install
     system "make", "install", "PREFIX=#{prefix}"
   end