uninstall, keg: update style

Library/Homebrew/cmd/uninstall.rb

@@ -16,10 +16,10 @@ module Homebrew
     raise KegUnspecifiedError if ARGV.named.empty?
 
     kegs_by_rack = if ARGV.force?
-      Hash[ARGV.named.map { |name|
+      Hash[ARGV.named.map do |name|
         rack = Formulary.to_rack(name)
         [rack, rack.subdirs.map { |d| Keg.new(d) }]
-      }]
+      end]
     else
       ARGV.kegs.group_by(&:rack)
     end

Library/Homebrew/keg.rb

@@ -104,9 +104,9 @@ class Keg
     # so need them to be calculated now.
     #
     # This happens after the initial dependency check because it's sloooow.
-    remaining_formulae = Formula.installed.select { |f|
+    remaining_formulae = Formula.installed.select do |f|
       f.installed_kegs.any? { |k| Tab.for_keg(k).runtime_dependencies.nil? }
-    }
+    end
 
     keg_names = kegs.map(&:name)
     kegs_by_name = kegs.group_by(&:to_formula)