fortran-comment-line-start-skip

fortran-comment-line-start-skip is a variable defined in `fortran.el'.
Its value is

"^[CcDd*!]\\(\\([^ 	
]\\)\\2+\\)?[ 	]*"

• This variable is safe as a file local variable if its value
  satisfies the predicate `stringp'.

Documentation:
Regexp to match the start of a full-line comment.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 21.1 of Emacs.