Compilers accept non terminated strings which are continued at the next line(especially with fixed format). result is that the string is concatenated.  When looking at the strings in the outputted code, these strings are concatenated instead of split over the different lines.

Example:
========
      SUBROUTINE strange_txt
        CHARACTER(LEN=150) :: full_txt
        DATA full_txt
     1/'tst1
     1  txt2
     1  txt3'
     1  /
        WRITE(*,*) full_txt
      END SUBROUTINE


The resulting output is:
========================
1      SUBROUTINE strange_txt
2        CHARACTER(LEN=150) :: full_txt
3        DATA full_txt
4     1/
5 
6 'tst1 1 txt2 1 txt3'
7     1  /
8        WRITE(*,*) full_txt
9      END SUBROUTINE

instead of:
===========
1      SUBROUTINE strange_txt
2        CHARACTER(LEN=150) :: full_txt
3        DATA full_txt
4     1/'tst1
5     1  txt2
6     1  txt3'
7     1  /
8        WRITE(*,*) full_txt
9      END SUBROUTINE