From 37c3e67ae6dbf2750fa964de3a38c905203044c3 Mon Sep 17 00:00:00 2001
From: Olle Jonsson <olle.jonsson@gmail.com>
Date: Fri, 6 Oct 2023 01:35:08 +0200
Subject: [PATCH] Splat builder that works with ActionView::OutputBuffer

This sketch of "have it work with Rails 7.1" for my app, it reacts to the fact that OutputBuffer no longer derives from String.
---
 lib/slim/splat/builder.rb | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/slim/splat/builder.rb b/lib/slim/splat/builder.rb
index 84ecdc99..efbecb59 100644
--- a/lib/slim/splat/builder.rb
+++ b/lib/slim/splat/builder.rb
@@ -35,7 +35,11 @@ def attr(name, value)
         end
         if @attrs[name]
           if delim = @options[:merge_attrs][name]
-            @attrs[name] += delim + value.to_s
+            if @attrs[name].respond_to?(:+)
+              @attrs[name] += delim + value.to_s
+            else
+              @attrs[name] << delim + value.to_s
+            end
           else
             raise("Multiple #{name} attributes specified")
           end