vue/mustache-interpolation-spacing 
enforce unified spacing in mustache interpolations
- ⚙️ This rule is included in all of 
"plugin:vue/vue3-strongly-recommended",*.configs["flat/strongly-recommended"],"plugin:vue/strongly-recommended",*.configs["flat/vue2-strongly-recommended"],"plugin:vue/vue3-recommended",*.configs["flat/recommended"],"plugin:vue/recommended"and*.configs["flat/vue2-recommended"]. - 🔧 The 
--fixoption on the command line can automatically fix some of the problems reported by this rule. 
📖 Rule Details 
This rule aims at enforcing unified spacing in mustache interpolations.
🔧 Options 
json
{
  "vue/mustache-interpolation-spacing": ["error", "always" | "never"]
}"always"(default) ... Expect one space between expression and curly brackets."never"... Expect no spaces between expression and curly brackets.
"never" 
🚀 Version 
This rule was introduced in eslint-plugin-vue v3.13.0