From e5d72ecc6ce59b1c2f1e049cb8e629a795aa43dd Mon Sep 17 00:00:00 2001
From: Markus Reiter <me@reitermark.us>
Date: Mon, 17 Aug 2020 06:08:56 +0200
Subject: [PATCH] Document `FormulaPin`.

---
 Library/Homebrew/formula_pin.rb | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Library/Homebrew/formula_pin.rb b/Library/Homebrew/formula_pin.rb
index f9c54097fa..613a51fc81 100644
--- a/Library/Homebrew/formula_pin.rb
+++ b/Library/Homebrew/formula_pin.rb
@@ -2,6 +2,9 @@
 
 require "keg"
 
+# Helper functions for pinning a formula.
+#
+# @api private
 class FormulaPin
   def initialize(f)
     @f = f