Remove line continuations in multiline YAML string

.circleci/config.yml

@@ -17,12 +17,11 @@ jobs:
       - run:
           name: Install Docker client
           command: |
-            curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add - \
-            apt-key fingerprint 0EBFCD88 \
-            add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu bionic stable" \
-            apt-get update \
-            apt-get install -y docker-ce=18.03.1~ce~3-0~ubuntu \
-            set -x
+            curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add -
+            apt-key fingerprint 0EBFCD88
+            add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu bionic stable"
+            apt-get update
+            apt-get install -y docker-ce=18.03.1~ce~3-0~ubuntu
 
       - setup_remote_docker:
           version: 18.03.1-ce