diff --git a/docs/.rubocop.yml b/docs/.rubocop.yml
index 1c984c707e2de..ca79d9e6ed746 100644
--- a/docs/.rubocop.yml
+++ b/docs/.rubocop.yml
@@ -32,3 +32,7 @@ Style/RedundantRegexpArgument:
 # Want to be able to display partial formulae in the docs.
 Style/TopLevelMethodDefinition:
   Enabled: false
+
+# Formulae and Casks no longer use `rm_f`/`rm_rf`, so the docs need to match.
+Lint/NonAtomicFileOperation:
+  Enabled: false
diff --git a/docs/Formula-Cookbook.md b/docs/Formula-Cookbook.md
index e037f01d61ccb..3883964384ffb 100644
--- a/docs/Formula-Cookbook.md
+++ b/docs/Formula-Cookbook.md
@@ -995,7 +995,7 @@ class Foo < Formula
   url "https://example.com/foo-1.0.tar.gz"
 
   def post_install
-    rm_f pkgetc/"cert.pem"
+    rm pkgetc/"cert.pem" if File.exist?(pkgetc/"cert.pem")
     pkgetc.install_symlink Formula["ca-certificates"].pkgetc/"cert.pem"
   end
   # ...