Update local_tutorial.md (#518)

diff --git a/docs/local_tutorial.md b/docs/local_tutorial.md
index 4fb4043..6e7ed49 100644
--- a/docs/local_tutorial.md
+++ b/docs/local_tutorial.md
@@ -44,7 +44,7 @@
 brew install --cask docker
 
 # Enable Kubernetes in Docker Settings, or run the command below:
-sed -i -e 's/"kubernetesEnabled" : false/"kubernetesEnabled" : true/g' \
+sed -i -e 's/"kubernetesEnabled": false/"kubernetesEnabled": true/g' \
     ~/Library/Group\ Containers/group.com.docker/settings.json
 
 # Start Docker for mac from Finder, or run the command below