trying double quote

linuxcat · linuxcat · commit c88ad6dc34bf · 2017-10-23T14:55:00.000+01:00
diff --git a/circle.yml b/circle.yml
@@ -1,4 +1,6 @@
 machine:
+  pre:
+  - curl -sSL https://s3.amazonaws.com/circle-downloads/install-circleci-docker.sh | bash -s -- 1.10.0
   services:
   - docker
   ruby:
