add backslash to bash command

Author: vroldanbet

.travis.yml

@@ -28,18 +28,18 @@ before_install:
 
 install:
   - >
-    docker run
-      --hostname ldap.example.org
-      --env LDAP_TLS_VERIFY_CLIENT=try
-      -p 389:389
-      -p 636:636
-      -v $(pwd)/test/fixtures/seed.ldif:/container/service/slapd/assets/config/bootstrap/ldif/50-bootstrap.ldif
-      -v $(pwd)/test/fixtures/openldap/retcode.ldif:/container/service/slapd/assets/config/bootstrap/ldif/06-retcodes.ldif
-      --name openldap
-      --detach
-      osixia/openldap:1.3.0
-        --copy-service
-        --loglevel debug
+    docker run \
+      --hostname ldap.example.org \
+      --env LDAP_TLS_VERIFY_CLIENT=try \
+      -p 389:389 \
+      -p 636:636 \
+      -v $(pwd)/test/fixtures/seed.ldif:/container/service/slapd/assets/config/bootstrap/ldif/50-bootstrap.ldif \
+      -v $(pwd)/test/fixtures/openldap/retcode.ldif:/container/service/slapd/assets/config/bootstrap/ldif/06-retcodes.ldif \
+      --name openldap \
+      --detach \
+      osixia/openldap:1.3.0 \
+        --copy-service \
+        --loglevel debug \
   - bundle install
 
 script: bundle exec rake ci