Unexpected trimming when value contains escaped delimiter

When parsing a property string value containing a delimiter character,
the resulting String is trimmed.
See the following example :

BaseConfiguration conf = new BaseConfiguration();
conf.setProperty("test1", "test\r\n");
conf.setProperty("test2", "test\\,test");
conf.setProperty("test3", "test\\,test\r\n");
System.out.println("*" + conf.getString("test1") + "*");
System.out.println("*" + conf.getString("test2") + "*");
System.out.println("*" + conf.getString("test3") + "*");

Expected :

*test
*
*test,test*
*test,test
*

Actual:

*test
*
*test,test*
*test,test*

This is caused by the flatten method in PropertyConverter which calls split(value,delimiter) which results in
split(value,delimiter,true) causing the trimming.

There is a workaround by using the value from another property :

test1=test\,test
test2=${test1}\r\n