Linuxbrew Formula for GNU Parallel, patched to ignore global configuration (/etc/parallel/config) thus avoiding the --tollef flag

parallel.rb

class Parallel < Formula
  desc "GNU parallel shell command"
  homepage "https://savannah.gnu.org/projects/parallel/"
  url "http://ftpmirror.gnu.org/parallel/parallel-20151122.tar.bz2"
  mirror "https://ftp.gnu.org/gnu/parallel/parallel-20151122.tar.bz2"
  sha256 "550a63be340f931b91dbfe0e726c64522f74ec5afd7a64086603533c694b165e"
  head "http://git.savannah.gnu.org/r/parallel.git"

  conflicts_with "moreutils", :because => "both install a 'parallel' executable."

  patch :DATA

  def install
    system "./configure", "--prefix=#{prefix}"
    system "make", "install"
  end

  test do
    assert_equal "test\ntest\n",
                 shell_output("#{bin}/parallel --will-cite echo ::: test test")
  end
end

__END__
diff --git a/src/parallel b/src/parallel
index 89f06df..0c1dd9a 100755
--- a/src/parallel
+++ b/src/parallel
@@ -1558,7 +1558,6 @@ sub read_options {
     if(not $opt::plain) {
 	# Add options from .parallel/config and other profiles
 	my @config_profiles = (
-	    "/etc/parallel/config",
 	    $ENV{'HOME'}."/.parallel/config",
 	    $ENV{'HOME'}."/.parallelrc");
 	my @profiles = @config_profiles;