Merge pull request #634 from elharo/gh-pages

add pull request template discouraging contributions
diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
new file mode 100644
index 0000000..1da16b1
--- /dev/null
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -0,0 +1,13 @@
+These style guides are copies of Google's internal style guides to
+assist developers working on Google owned and originated open source
+projects. Changes should be made to the internal style guide first and
+only then copied here.
+
+Unsolicited pull requests will not be merged and are usually closed
+without comment. If a PR points out a simple mistake — a typo, a broken
+link, etc. — then the correction can be made internally and copied here
+through the usual process.
+
+Substantive changes to the style rules and suggested new rules should
+not be submitted as a PR in this repository. Material changes must be
+proposed, discussed, and approved on the internal forums first.