diff --git a/.gitignore b/.gitignore
index c6e5a09..f25e043 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,14 @@
+# Add patterns in here to exclude files created by tools integrated with this
+# repository, such as test frameworks from the project's recommended workflow,
+# rendered documentation and package builds.
+#
+# Don't add patterns to exclude files created by preferred personal tools
+# (editors, IDEs, your operating system itself even). These should instead be
+# maintained outside the repository, for example in a ~/.gitignore file added
+# with:
+#
+# git config --global core.excludesfile '~/.gitignore'
+
 .bundled_gems/
 modules/
 Gemfile.lock
-*.swp