Designer lost code format once OK button is clicked

Using script task, the format of the code is lost once the ok button is pressed.

step for reproducing:
1. create a new bpm process
2. add script task
3. selecting java as language
4. add any code e.g.:
kcontext.setVariable("transactions",history.getValues());
System.out.println("Found " + history.getValues().size() + " transactions");
5. click ok
6. reopen the script
7. the code is now w/o new line char e.g
kcontext.setVariable("transactions",history.getValues());System.out.println("Found " + history.getValues().size() + " transactions");