Continuing messages on the next line
All text following the blank after the message number is included as message text, up to the end of the line. Use the escape character \ (backslash) to continue message text on the following line.
The \ (backslash) must be the last character on the line as in the following example:
5 This is the text associated with \
message number 5.These two physical lines define the single-line message:
This is the text associated with message number 5.Note: The use of more than one blank character after the message number
or symbolic identifier is specific to the Message Facility. Portability
of message source files can be affected by the use of more than one
blank.