From b904c00d887ebba23fc301d3b6fadb25ad9a134d Mon Sep 17 00:00:00 2001
From: Mark Campbell <nitrodist@gmail.com>
Date: Wed, 20 Mar 2024 16:04:33 -0500
Subject: [PATCH] Fix newlines not being properly escaped

Closes #28 https://github.com/ruby-formatter/rufo-vim/issues/28
---
 autoload/rufo.vim | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/autoload/rufo.vim b/autoload/rufo.vim
index fe423a9..dde5238 100644
--- a/autoload/rufo.vim
+++ b/autoload/rufo.vim
@@ -61,7 +61,9 @@ function! s:format(start_line, end_line) abort
     silent exec l:buffer_number . 'bdelete'
   endif
 
-  let l:selection = join(getline(a:start_line, a:end_line), "\n")
+  let l:lines = getline(a:start_line, a:end_line)
+  let l:escaped_lines = map(l:lines, 'substitute(v:val, "\\\\n", "\\\\\\\\n", "g")')
+  let l:selection = join(l:escaped_lines, "\n")
   let l:out = systemlist('echo ' . shellescape(l:selection) . '| rufo')
   return [s:formatting_failed(v:shell_error), l:out]
 endf