info: display used options for all installed kegs

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Library/Homebrew/cmd/info.rb

@@ -58,17 +58,14 @@ module Homebrew extend self
         print "#{keg} (#{keg.abv})"
         print " *" if f.installed_prefix == keg and kegs.length > 1
         puts
-      end
-    else
-      puts "Not installed"
-    end
-
-    if f.installed?
-      tab = Tab.for_formula f
+        tab = Tab.for_keg keg
         unless tab.used_options.empty?
           puts "  Installed with: #{tab.used_options*', '}"
         end
       end
+    else
+      puts "Not installed"
+    end
 
     the_caveats = (f.caveats || "").strip
     unless the_caveats.empty?