Rakefile : revise to overwrite previous file

Rakefile

@@ -1,4 +1,5 @@
 # automates minifying jquery.isotope.js
+# requires Google Closure Compiler http://code.google.com/closure/compiler/
 # from command line run:
 #     rake min COMPILER='path/to/compiler.jar'
 file compiler = ENV["COMPILER"] || '~/resources/google-closure/compiler.jar'
@@ -6,15 +7,13 @@ js = 'jquery.isotope.js'
 min_js = 'jquery.isotope.min.js'
 
 desc "Generates #{min_js}"
-task :min => min_js
-
-file min_js => compiler do
+task :min do
   puts "Minifying jquery.isotope.js..."
   sh "java -jar #{compiler} --js #{js} --js_output_file #{min_js}"
   # Adds header comment
   min = File.read( min_js )
   File.open( min_js, 'w') do |f|
-    f.write File.readlines( js )[0..5].join()
+    f.write File.readlines( js )[0..9].join()
     f.write min
   end
 end