Updating the string methods used

lib/gitlab/diff/suggestion_diff.rb

@@ -18,19 +18,15 @@ module Gitlab
       private
 
       def raw_diff
-        "#{diff_header}\n#{from_content_as_diff}#{spacer}#{to_content_as_diff}"
+        "#{diff_header}\n#{from_content_as_diff}\n#{to_content_as_diff}"
       end
 
       def diff_header
         "@@ -#{from_line} +#{from_line}"
       end
 
-      def spacer
-        "\n" unless from_content_as_diff[-1, 3] == "\n"
-      end
-
       def from_content_as_diff
-        from_content.lines.map { |line| line.prepend('-') }.join
+        from_content.lines.map { |line| line.prepend('-') }.join.delete_suffix("\n")
       end
 
       def to_content_as_diff