From b1b82847aa1db5040b18daf7b601f9c63c96a99c Mon Sep 17 00:00:00 2001
From: Brad Zacher <brad.zacher@gmail.com>
Date: Mon, 23 Mar 2020 16:06:15 -0700
Subject: [PATCH] docs(eslint-plugin): [prefer-readonly-parameter-types] fix
 invalid example (#1791)

---
 .../docs/rules/prefer-readonly-parameter-types.md              | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/eslint-plugin/docs/rules/prefer-readonly-parameter-types.md b/packages/eslint-plugin/docs/rules/prefer-readonly-parameter-types.md
index c69b3b21c34..74697f2d3e6 100644
--- a/packages/eslint-plugin/docs/rules/prefer-readonly-parameter-types.md
+++ b/packages/eslint-plugin/docs/rules/prefer-readonly-parameter-types.md
@@ -74,7 +74,8 @@ function object3(arg: { readonly prop: { readonly prop2: string } }) {}
 interface CustomArrayType extends ReadonlyArray<string> {
   readonly prop: string;
 }
-function custom1(arg: CustomArrayType) {}
+function custom1(arg: Readonly<CustomArrayType>) {}
+// interfaces that extend the array types are not considered arrays, and thus must be made readonly.
 
 interface CustomFunction {
   (): void;