Allow inreplace to operate over arrays

I like that String.each is interchangeable with Array.each :)

Library/Homebrew/utils.rb

@@ -195,6 +195,7 @@ module HomebrewInreplaceExtension
 end
 
 def inreplace path, before=nil, after=nil
+  path.each do |path|
     f = File.open(path, 'r')
     s = f.read
 
@@ -208,6 +209,7 @@ def inreplace path, before=nil, after=nil
     f.reopen(path, 'w').write(s)
     f.close
   end
+end
 
 def ignore_interrupts
   std_trap = trap("INT") {}