/[NO]PAD_SOURCE

  Controls how the compiler treats fixed-form source code lines which
  are shorter than the statement field width (72 characters, or 132
  characters if /EXTEND_SOURCE is in effect.) This option has an
  effect on how the compiler treats character and Hollerith constants
  that are continued across two or more source lines.

  Specifying /PAD_SOURCE causes the compiler to treat short source
  lines as if they were padded with blanks out to the statement field
  width.  This may be useful when compiling programs developed for
  non-OpenVMS platforms which may assume that short source lines are
  blank-padded.

  The default, /NOPAD_SOURCE, is compatible with current HP
  Fortran and previous OpenVMS Fortran compilers, which causes the
  compiler to not treat short source lines as padded with blanks so
  that the first character of a continuation line immediately follows
  the last character of the previous line.

  If /NOPAD_SOURCE is in effect, the compiler will issue an
  informational diagnostic message if it detects a continued constant
  which may be affected by blank padding.