added an empty line for better readability

roles/mastodon/tasks/system_setup/ruby.yml

@@ -32,6 +32,7 @@
     content: |
       export PATH="~/.rbenv/bin:${PATH}"
       eval "$(rbenv init -)"
+
 - name: mastodon | Check if the Ruby version is already installed
   shell: "~/.rbenv/bin/rbenv versions | grep -q {{ ruby_version }}"
   register: ruby_installed