Comment needed changes if HOMEBREW_LIBRARY changes

Library/Homebrew/formula_cellar_checks.rb

@@ -7,6 +7,8 @@ require "utils/shell"
 #
 # @api private
 module FormulaCellarChecks
+  # If the location of HOMEBREW_LIBRARY changes
+  # keg_relocate.rb, test/global_spec.rb, and this constant need to change.
   REPOSITORY_AND_NOT_LIBRARY_REGEX = %r{#{HOMEBREW_REPOSITORY}(?!/Library/)}.freeze
 
   def check_env_path(bin)

Library/Homebrew/keg_relocate.rb

@@ -5,6 +5,9 @@ class Keg
   PREFIX_PLACEHOLDER = "@@HOMEBREW_PREFIX@@"
   CELLAR_PLACEHOLDER = "@@HOMEBREW_CELLAR@@"
   REPOSITORY_PLACEHOLDER = "@@HOMEBREW_REPOSITORY@@"
+
+  # If the location of HOMEBREW_LIBRARY changes
+  # formula_cellar_checks.rb, test/global_spec.rb, and this constant need to change.
   LIBRARY_PLACEHOLDER = "@@HOMEBREW_REPOSITORY@@/Library"
 
   Relocation = Struct.new(:old_prefix, :old_cellar, :old_repository, :old_library,

Library/Homebrew/test/global_spec.rb

@@ -9,6 +9,8 @@ describe "brew", :integration_test do
       .and be_a_success
   end
 
+  # If the location of HOMEBREW_LIBRARY changes
+  # keg_relocate.rb, formula_cellar_checks.rb, and this test need to change.
   it "ensures that HOMEBREW_LIBRARY=HOMEBREW_REPOSITORY/Library" do
     expect(HOMEBREW_LIBRARY.to_s).to eq("#{HOMEBREW_REPOSITORY}/Library")
   end

bin/brew

@@ -58,6 +58,8 @@ then
   fi
 fi
 
+# If the location of HOMEBREW_LIBRARY changes
+# keg_relocate.rb, formula_cellar_checks.rb, and test/global_spec.rb need to change.
 HOMEBREW_LIBRARY="$HOMEBREW_REPOSITORY/Library"
 
 # Copy and export all HOMEBREW_* variables previously mentioned in