correcting match_for_absence behavior

Author: felixdoerre

lib/puppet/provider/file_line/ruby.rb

@@ -14,7 +14,7 @@ def exists?
       match_count = count_matches(new_match_regex)
       if resource[:append_on_no_match].to_s == 'false'
         found = true
-      elsif resource[:replace].to_s == 'true'
+      elsif resource[:replace].to_s == 'true' && resource[:match_for_absence].to_s != 'true'
         found = lines_count > 0 && lines_count == match_count
       else
         found = match_count > 0