From 9b7549b4d0235815d4daff5e4b70feeb2da02e31 Mon Sep 17 00:00:00 2001
From: Holger Just <hello@holgerjust.de>
Date: Tue, 9 May 2017 22:38:43 +0200
Subject: [PATCH] Add comment explaining the required_ruby_version to gemspec

---
 rackstash.gemspec | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/rackstash.gemspec b/rackstash.gemspec
index 84abd77..91558ca 100644
--- a/rackstash.gemspec
+++ b/rackstash.gemspec
@@ -22,6 +22,12 @@ Gem::Specification.new do |spec|
   spec.homepage      = 'https://github.com/meineerde/rackstash'
   spec.license       = 'MIT'
 
+  # We require at least Ruby 2.1 due to the use of:
+  # * implicit String#scrub during String#encode as used in
+  #   Rackstash::Fields::AbstractCollection#utf8_encode.
+  #   We might be able to use the string-scrub gem as a polyfill and explicitly
+  #   call scrub on lower versions though.
+  # * mandatory keyword arguments
   spec.required_ruby_version = '>= 2.1.0'
 
   files = `git ls-files -z`.split("\x0")