chore: use displayname

_data/rules.yml

@@ -126,6 +126,7 @@ removed:
 ruleTypes:
   - &ref_0
     description: Warns about a potential error.
+    displayName: Possible Problems
     name: problem
     rules:
       - description: enforce `return` statements in callbacks of array methods
@@ -362,6 +363,7 @@ ruleTypes:
         recommended: true
   - &ref_1
     description: Suggests an alternate way of doing something.
+    displayName: Suggestions
     name: suggestion
     rules:
       - description: enforce getter and setter pairs in objects and classes
@@ -972,6 +974,7 @@ ruleTypes:
         recommended: false
   - &ref_2
     description: Enforces code style.
+    displayName: Layout & Formatting
     name: layout
     rules:
       - description: enforce linebreaks after opening and before closing array brackets

docs/rules/index.liquid

@@ -8,7 +8,7 @@ layout: doc
 <p>No rules are enabled by default. The <code>"extends": "eslint:recommended"</code> property in a <a href="../user-guide/configuring#extending-configuration-files">configuration file</a> enables rules that report common problems, which have a check mark (recommended) below.</p>
 <p>The <code>--fix</code> option on the <a href="../user-guide/command-line-interface#fix">command line</a> automatically fixes problems (currently mostly whitespace) reported by rules which have a wrench (fixable) below.</p>
 {% for type in rules.types %}
-  <h2>{{ type.name }}</h2>
+  <h2>{{ type.displayName }}</h2>
   {{ type.description }}
   <table class="rule-list table table-striped">
     <colgroup>