From 5291bf235b49cb35b6bb4512295fbe2b495ed27a Mon Sep 17 00:00:00 2001
From: mehrdadn <mehrdadn@users.noreply.github.com>
Date: Mon, 13 Jul 2020 05:52:40 -0700
Subject: [PATCH] TRAVIS_PULL_REQUEST is false for non-PRs, not empty (#9439)

Co-authored-by: Mehrdad <noreply@github.com>
---
 .travis.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index 32351fd72..ff8ad8be9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,7 +13,7 @@ before_install:
     git clone -q -n "https://github.com/${TRAVIS_REPO_SLUG}.git" "${TRAVIS_REPO_SLUG}"
     cd -- "${TRAVIS_REPO_SLUG}"
     to_fetch=("${TRAVIS_COMMIT}")
-    if [ -n "${TRAVIS_PULL_REQUEST-}" ]; then to_fetch+=("+refs/pull/${TRAVIS_PULL_REQUEST}/merge:"); fi
+    if [ false != "${TRAVIS_PULL_REQUEST-}" ]; then to_fetch+=("+refs/pull/${TRAVIS_PULL_REQUEST}/merge:"); fi
     git fetch -q -- origin "${to_fetch[@]}"
     git checkout -qf "${TRAVIS_COMMIT}" --