[SalesForce] Escape backslash

That's pretty strange, and seems like a bug since you don't need to do anything in this case to handle single quotes.

It's working for me when I did the following I created a custom label, A_Test, with a value of "haven't", and ran the following and everything worked as expected. Assertions passed and email received with single quote intact. Perhaps you can try this out and see if the assertions fail for you? If they do I'd recommend logging a case with support.

String expected = 'haven\'t';
system.assertEquals(expected, Label.A_Test);
Messaging.SingleEmailMessage email = new Messaging.SingleEmailMessage();
email.setToAddresses(new String[] { 'ralph@example.com' });
email.setSubject('Expected: ' + expected + '. Label: ' + Label.A_Test);
email.setPlainTextBody('Expected: ' + expected + '. Label: ' + Label.A_Test);
system.assertEquals(true, email.getSubject().contains('\''));
system.assertEquals(true, email.getPlainTextBody().contains('\''));
Messaging.sendEmail(new Messaging.SingleEmailMessage[] { email });

Split in Apex is very similar to Java string split.

the pattern you pass to the split method is not a direct match, its a REGEX pattern. so the pipe symbol | is considered as a Regex input and it splits the string into individual characters.

You can use the below code to get thru this

newString.split('\\|')

here's some other discussions around the same topic

https://stackoverflow.com/questions/6978901/splitting-a-string-using

and a blog post from Lacey on the same topic