document tsconfig options without a documented default as default: false

Author: dynst

packages/tsconfig-reference/scripts/tsconfigRules.ts

@@ -281,6 +281,8 @@ function formatDefaultValue(
   defaultValue: CommandLineOption["defaultValueDescription"],
   type: CommandLineOption["type"]
 ) {
+  if (type === "boolean" && defaultValue === undefined)
+    return "false";
   if (defaultValue === undefined || typeof type !== "object")
     return defaultValue;
   // e.g. ScriptTarget.ES2015 -> "es6/es2015"