jboss-server-migration.sh replaces 	 (tab) with space in standalone.xml

Issue

In migrate standalone.xml from EAP 7.0 to 7.2, jboss-server-migration.sh outputs unexpected pattern attribute that is replaced tab with space as below:

input standalone.xml:

<access-log pattern="%a&#009;%A:%p&#009;%{time,yyyy-MM-dd HH:mm:ss}&#009;%m&#009;%U&#009;%s&#009;%b&#009;%T"/>

result:

<access-log pattern="%a %A:%p %{time,yyyy-MM-dd HH:mm:ss} %m %U %s %b %T"/>

expected (same as input):

<access-log pattern="%a&#009;%A:%p&#009;%{time,yyyy-MM-dd HH:mm:ss}&#009;%m&#009;%U&#009;%s&#009;%b&#009;%T"/>