ssss: modernize

The CC replacement was invalid, and superenv removes
the need for setting include paths manually.

Formula/ssss.rb

@@ -1,23 +1,21 @@
-require 'formula'
+require "formula"
 
 class Ssss < Formula
-  homepage 'http://point-at-infinity.org/ssss/'
-  url 'http://point-at-infinity.org/ssss/ssss-0.5.tar.gz'
-  sha1 '3f8f5046c2c5c3a2cf1a93f0a9446681852b190e'
+  homepage "http://point-at-infinity.org/ssss/"
+  url "http://point-at-infinity.org/ssss/ssss-0.5.tar.gz"
+  sha1 "3f8f5046c2c5c3a2cf1a93f0a9446681852b190e"
 
-  depends_on 'gmp'
-  depends_on 'xmltoman'
+  depends_on "gmp"
+  depends_on "xmltoman"
 
   def install
-    inreplace 'Makefile' do |s|
+    inreplace "Makefile" do |s|
       # Compile with -DNOMLOCK to avoid warning on every run on OS X.
-      s.gsub! /\-W /, '-W -DNOMLOCK $(CFLAGS) $(LDFLAGS)'
-      s.change_make_var! "CC", ENV.cc
+      s.gsub! /\-W /, "-W -DNOMLOCK $(CFLAGS) $(LDFLAGS)"
     end
 
-    ENV.append 'CFLAGS', "-I#{HOMEBREW_PREFIX}/include"
     system "make"
-    man1.install 'ssss.1'
+    man1.install "ssss.1"
     bin.install %w{ ssss-combine ssss-split }
   end
 end