diff --git a/Library/.rubocop_todo.yml b/Library/.rubocop_todo.yml
index fde1d853fb..421944874a 100644
--- a/Library/.rubocop_todo.yml
+++ b/Library/.rubocop_todo.yml
@@ -109,14 +109,6 @@ Style/CaseEquality:
   Exclude:
     - 'Homebrew/compilers.rb'
 
-# Offense count: 1
-# Cop supports --auto-correct.
-# Configuration parameters: IndentWhenRelativeTo, SupportedStyles, IndentOneStep, IndentationWidth.
-# SupportedStyles: case, end
-Style/CaseIndentation:
-  Exclude:
-    - 'Homebrew/keg.rb'
-
 # Offense count: 11
 Style/ClassVars:
   Exclude:
diff --git a/Library/Homebrew/keg.rb b/Library/Homebrew/keg.rb
index db3705bc10..e49c8126b1 100644
--- a/Library/Homebrew/keg.rb
+++ b/Library/Homebrew/keg.rb
@@ -66,8 +66,13 @@ class Keg
   INFOFILE_RX = %r{info/([^.].*?\.info|dir)$}
   TOP_LEVEL_DIRECTORIES = %w[bin etc include lib sbin share var Frameworks].freeze
   ALL_TOP_LEVEL_DIRECTORIES = (TOP_LEVEL_DIRECTORIES + %w[lib/pkgconfig share/locale share/man opt]).freeze
-  PRUNEABLE_DIRECTORIES = %w[bin etc include lib sbin share Frameworks LinkedKegs var/homebrew/linked].map do |d|
-    case d when "LinkedKegs" then HOMEBREW_LIBRARY/d else HOMEBREW_PREFIX/d end
+  PRUNEABLE_DIRECTORIES = %w[bin etc include lib sbin share Frameworks LinkedKegs var/homebrew/linked].map do |dir|
+    case dir
+    when "LinkedKegs"
+      HOMEBREW_LIBRARY/dir
+    else
+      HOMEBREW_PREFIX/dir
+    end
   end
 
   # These paths relative to the keg's share directory should always be real