f90-program-block-re

f90-program-block-re is a variable defined in `f90.el'.
Its value is

"\\(function\\|module\\|program\\|sub\\(?:\\(?:modul\\|routin\\)e\\)\\)"

• This variable may be risky if used as a file-local variable.

Documentation:
Regexp used to locate the start/end of a "subprogram".