Ruby 1.9 Array.to_s behaves differently?

i wrote a quick little application that takes a base file of code with some keywords, a file of replacements for the keywords, and outputs a new file with the keywords replaced.

When i was using Ruby 1.8, my outputs would look fine. Now when using Ruby 1.9, my replaced code has the newline characters in it instead of line feeds.

For example, i see something like:

["\r\nDim RunningNormal_1 As Boolean", "\r\nDim RunningNormal_2 As Boolean", "\r\nDim RunningNormal_3 As Boolean"]

instead of:

Dim RunningNormal_1 As Boolean
Dim RunningNormal_2 As Boolean
Dim RunningNormal_3 As Boolean

i use a hash of replacements {"KEYWORD"=>["1","2","3"]} and an array of the replaced lines.

i use this block to finish the replacement:

resultingLibs.each do |x|
  libraryString.sub!(/(<REPEAT>(.*?)<\/REPEAT>)/im) do |match|
    x.each do |individual|
      individual.to_s 
    end
  end
end
#for each resulting group of the repeatable pattern,
#  
#Write out the resulting libs to a combined string

My hunch is that i'm printing out the array instead of the strings within the array. Any suggestions on a fix. When i debug and print my replaced string using puts, the output looks correct. When i use the to_s method (which is how my app writes the output to the output file), my output looks wrong.

A fix would be nice, but what i really want to know is what changed between Ruby 1.8 and 1.9 that causes this behavior. Has the to_s method changed somehow in Ruby 1.9?

*i'm inexperienced in Ruby