Docs: trivial update

Author: mysticatea

docs/README.md

@@ -2,6 +2,13 @@
 home: true
 actionText: Get Started →
 actionLink: /guide/getting-started
+features:
+- title: Scope Utilities
+  details: Finding the specific global variables and their members with tracking assignments, finding variables, etc...
+- title: AST Utilities
+  details: Computing the runtime value of a node, Getting the property name of a Property|MemberExpression|MemberExpression node, etc...
+- title: Token Utilities
+  details: Distinguishing the token types of a given token, etc...
 ---
 
 <center>

docs/api/ast-utils.md

@@ -361,26 +361,23 @@ Check whether a given node is parenthesized or not.
 This function detects it correctly even if it's parenthesized by specific syntax.
 
 ```js
-f(a); //→ this `a` is not parenthesized.
-f((b)); //→ this `b` is parenthesized.
-
-new C(a); //→ this `a` is not parenthesized.
-new C((b)); //→ this `b` is parenthesized.
-
-if (a) {} //→ this `a` is not parenthesized.
-if ((b)) {} //→ this `b` is parenthesized.
-
-switch (a) {} //→ this `a` is not parenthesized.
-switch ((b)) {} //→ this `b` is parenthesized.
-
-while (a) {} //→ this `a` is not parenthesized.
-while ((b)) {} //→ this `b` is parenthesized.
-
-do {} while (a); //→ this `a` is not parenthesized.
-do {} while ((b)); //→ this `b` is parenthesized.
-
-with (a) {} //→ this `a` is not parenthesized.
-with ((b)) {} //→ this `b` is parenthesized.
+// those `a` are not parenthesized.
+f(a);
+new C(a);
+if (a) {}
+switch (a) {}
+while (a) {}
+do {} while (a);
+with (a) {}
+
+// those `b` are parenthesized.
+f((b));
+new C((b));
+if ((b)) {}
+switch ((b)) {}
+while ((b)) {}
+do {} while ((b));
+with ((b)) {}
 ```
 
 ### Parameters