From 14d53d5f914fd926b49e6492fd7bd95e62ef541a Mon Sep 17 00:00:00 2001
From: Pat Allan <pat@freelancing-gods.com>
Date: Tue, 29 Oct 2024 19:35:18 +1100
Subject: [PATCH] Support frozen string literals (#105)

This is to avoid deprecation warnings with the forthcoming change in
Ruby 3.4 where modifying a string literal will cause a deprecation
warning by default.
https://github.com/ruby/ruby/commit/12be40ae6be78ac41e8e3f3c313cc6f63e7fa6c4

Co-authored-by: Johannes Opper <xijo@pm.me>
---
 lib/reverse_markdown/converters/base.rb       | 2 +-
 lib/reverse_markdown/converters/blockquote.rb | 2 +-
 lib/reverse_markdown/converters/div.rb        | 2 +-
 lib/reverse_markdown/converters/figcaption.rb | 2 +-
 lib/reverse_markdown/converters/ol.rb         | 2 +-
 lib/reverse_markdown/converters/p.rb          | 2 +-
 lib/reverse_markdown/converters/pre.rb        | 4 ++--
 lib/reverse_markdown/converters/table.rb      | 2 +-
 8 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/lib/reverse_markdown/converters/base.rb b/lib/reverse_markdown/converters/base.rb
index 7ab25ee..cfdf7c9 100644
--- a/lib/reverse_markdown/converters/base.rb
+++ b/lib/reverse_markdown/converters/base.rb
@@ -2,7 +2,7 @@ module ReverseMarkdown
   module Converters
     class Base
       def treat_children(node, state)
-        node.children.inject('') do |memo, child|
+        node.children.inject(+'') do |memo, child|
           memo << treat(child, state)
         end
       end
diff --git a/lib/reverse_markdown/converters/blockquote.rb b/lib/reverse_markdown/converters/blockquote.rb
index e4b2a97..68022a9 100644
--- a/lib/reverse_markdown/converters/blockquote.rb
+++ b/lib/reverse_markdown/converters/blockquote.rb
@@ -4,7 +4,7 @@ class Blockquote < Base
       def convert(node, state = {})
         content = treat_children(node, state).strip
         content = ReverseMarkdown.cleaner.remove_newlines(content)
-        "\n\n> " << content.lines.to_a.join('> ') << "\n\n"
+        +"\n\n> " << content.lines.to_a.join('> ') << "\n\n"
       end
     end
 
diff --git a/lib/reverse_markdown/converters/div.rb b/lib/reverse_markdown/converters/div.rb
index ad26303..8d49344 100644
--- a/lib/reverse_markdown/converters/div.rb
+++ b/lib/reverse_markdown/converters/div.rb
@@ -2,7 +2,7 @@ module ReverseMarkdown
   module Converters
     class Div < Base
       def convert(node, state = {})
-        "\n" << treat_children(node, state) << "\n"
+        +"\n" << treat_children(node, state) << "\n"
       end
     end
 
diff --git a/lib/reverse_markdown/converters/figcaption.rb b/lib/reverse_markdown/converters/figcaption.rb
index 30ec3f1..c8ebc86 100644
--- a/lib/reverse_markdown/converters/figcaption.rb
+++ b/lib/reverse_markdown/converters/figcaption.rb
@@ -5,7 +5,7 @@ def convert(node, state = {})
         if node.text.strip.empty?
           ""
         else
-          "\n" << "_#{node.text.strip}_" << "\n"
+          +"\n" << "_#{node.text.strip}_" << "\n"
         end
       end
     end
diff --git a/lib/reverse_markdown/converters/ol.rb b/lib/reverse_markdown/converters/ol.rb
index 2fa3a02..b305b61 100644
--- a/lib/reverse_markdown/converters/ol.rb
+++ b/lib/reverse_markdown/converters/ol.rb
@@ -3,7 +3,7 @@ module Converters
     class Ol < Base
       def convert(node, state = {})
         ol_count = state.fetch(:ol_count, 0) + 1
-        "\n" << treat_children(node, state.merge(ol_count: ol_count)) << "\n"
+        +"\n" << treat_children(node, state.merge(ol_count: ol_count)) << "\n"
       end
     end
 
diff --git a/lib/reverse_markdown/converters/p.rb b/lib/reverse_markdown/converters/p.rb
index 67cc2c8..7144608 100644
--- a/lib/reverse_markdown/converters/p.rb
+++ b/lib/reverse_markdown/converters/p.rb
@@ -2,7 +2,7 @@ module ReverseMarkdown
   module Converters
     class P < Base
       def convert(node, state = {})
-        "\n\n" << treat_children(node, state).strip << "\n\n"
+        +"\n\n" << treat_children(node, state).strip << "\n\n"
       end
     end
 
diff --git a/lib/reverse_markdown/converters/pre.rb b/lib/reverse_markdown/converters/pre.rb
index 2fec5d2..2b31a7b 100644
--- a/lib/reverse_markdown/converters/pre.rb
+++ b/lib/reverse_markdown/converters/pre.rb
@@ -4,9 +4,9 @@ class Pre < Base
       def convert(node, state = {})
         content = treat_children(node, state)
         if ReverseMarkdown.config.github_flavored
-          "\n```#{language(node)}\n" << content.strip << "\n```\n"
+          +"\n```#{language(node)}\n" << content.strip << "\n```\n"
         else
-          "\n\n    " << content.lines.to_a.join("    ") << "\n\n"
+          +"\n\n    " << content.lines.to_a.join("    ") << "\n\n"
         end
       end
 
diff --git a/lib/reverse_markdown/converters/table.rb b/lib/reverse_markdown/converters/table.rb
index 5877c73..9f20939 100644
--- a/lib/reverse_markdown/converters/table.rb
+++ b/lib/reverse_markdown/converters/table.rb
@@ -2,7 +2,7 @@ module ReverseMarkdown
   module Converters
     class Table < Base
       def convert(node, state = {})
-        "\n\n" << treat_children(node, state) << "\n"
+        +"\n\n" << treat_children(node, state) << "\n"
       end
     end