_IS_DRIVE_LETTER   63 maint/gnulib/lib/filename.h # define _IS_DRIVE_LETTER(C) \
_IS_DRIVE_LETTER   66 maint/gnulib/lib/filename.h # undef _IS_DRIVE_LETTER
_IS_DRIVE_LETTER   67 maint/gnulib/lib/filename.h # define _IS_DRIVE_LETTER(C) \