podiff 1.1

Closes Homebrew/legacy-homebrew#18410.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Formula/podiff.rb

@@ -0,0 +1,32 @@
+require 'formula'
+
+class Podiff < Formula
+  homepage 'http://puszcza.gnu.org.ua/software/podiff/'
+  url 'http://download.gnu.org.ua/pub/release/podiff/podiff-1.1.tar.gz'
+  sha1 'c354a42c215d0b7768b30c1db13729177cec4c7a'
+
+  def install
+    system "make"
+    bin.install "podiff"
+    man1.install "podiff.1"
+  end
+
+  def caveats; <<-EOS.undent
+    To use with git, add this to your .git/config or global git config file:
+
+      [diff "podiff"]
+      command = #{HOMEBREW_PREFIX}/bin/podiff -D-u
+
+    Then add the following line to the .gitattributes file in
+    the directory with your PO files:
+
+      *.po diff=podiff
+
+    See `man podiff` for more information.
+    EOS
+  end
+
+  test do
+    system "podiff -v"
+  end
+end