[Python-checkins] Create PULL_REQUEST_TEMPLATE.md (GH-3404)

[Mariatta]

https://github.com/python/cpython/commit/36d644d37acb1e33a3f1e96bf92f68e619a75880
commit: 36d644d37acb1e33a3f1e96bf92f68e619a75880
branch: master
author: Mariatta <Mariatta at users.noreply.github.com>
committer: GitHub <noreply at github.com>
date: 2017-09-06T17:27:05-07:00
summary:

Create PULL_REQUEST_TEMPLATE.md (GH-3404)

Explain that backport PR should include branch name and the original PR number.

files:
A .github/PULL_REQUEST_TEMPLATE.md

diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
new file mode 100644
index 00000000000..70f4a6ce6bf
--- /dev/null
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -0,0 +1,10 @@
+!!! If this is a backport PR (PR made against branches other than `master`),
+please ensure that the PR title is in the following format:
+
+[X.Y] <title from the original PR> GH-NNNN
+
+Where: [X.Y] is the branch name, for example [3.6]
+
+GH-NNNN refers to the PR number from `master`.
+
+PLEASE: Remove this headline!!!