Merge pull request #1118 from chaadow/patch-1

Fix for frozen string literal to prepare for ruby 3.4

Author: unixmonkey

lib/wicked_pdf/tempfile.rb

@@ -23,9 +23,9 @@ def write_in_chunks(input_string)
     def read_in_chunks
       rewind
       binmode
-      output_string = ''
-      output_string << read(chunk_size) until eof?
-      output_string
+      chunks = []
+      chunks << read(chunk_size) until eof?
+      chunks.join
     rescue Errno::EINVAL => e
       raise e, file_too_large_message
     end