Removal of Useless symbol '[' (#1851)

www/_template/reference/plugins.md

@@ -87,7 +87,7 @@ An list of any npm dependencies that are added as a part of `load()` or `transfo
 resolve: {input: [".sass"], output: [".css"]}
 
 // Example: Svelte plugin compiles Svelte files to JS & CSS.
-resolve: {input: [".svelte"], output: [".js",[".css"]}
+resolve: {input: [".svelte"], output: [".js", ".css"]}
 ```
 
 If your plugin defines a `load()` method, Snowpack will need to know what files your plugin is responsible to load and what its output will look like. **`resolve` is needed only if you also define a `load()` method.**