Apply new format to snippets and template

snippets/isString.md

@@ -5,7 +5,7 @@ tags: type,string,beginner
 
 Checks if the given argument is a string. Only works for string primitives.
 
-Use `typeof` to check if a value is classified as a string primitive.
+- Use `typeof` to check if a value is classified as a string primitive.
 
 ```js
 const isString = val => typeof val === 'string';
@@ -13,4 +13,4 @@ const isString = val => typeof val === 'string';
 
 ```js
 isString('10'); // true
-```
+```