diff --git a/.gitignore b/.gitignore
index 50abd51a25a..e15c360ed34 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,5 +2,7 @@
 /.bundle/
 
 # anywhere in the tree
+*~
+.DS_Store
 .ruby-version
 coverage
diff --git a/test/layout_test.rb b/test/layout_test.rb
index 366e138f3f2..a92f6107eeb 100644
--- a/test/layout_test.rb
+++ b/test/layout_test.rb
@@ -5,7 +5,7 @@ describe "Repo layout" do
 
   # todo: a more clever way to do this would be to dispense with
   #       the imperfect IGNORE lists and read the actual repo
-  #       contents by running "git ls-files
+  #       contents by reading the output of "git ls-files"
 
   # dot dirs are always a project of Dir.entries
   # other files are items that the developer hopefully has gitignored