===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/units/units.1,v
retrieving revision 1.27
retrieving revision 1.28
diff -c -r1.27 -r1.28
*** src/usr.bin/units/units.1	2022/02/18 10:24:33	1.27
--- src/usr.bin/units/units.1	2022/12/26 18:52:10	1.28
***************
*** 1,4 ****
! .\" $OpenBSD: units.1,v 1.27 2022/02/18 10:24:33 jsg Exp $
  .\" converted to new format by deraadt@openbsd.org
  .\"
  .\" Copyright (c) 1993 by Adrian Mariano (adrian@cam.cornell.edu)
--- 1,4 ----
! .\" $OpenBSD: units.1,v 1.28 2022/12/26 18:52:10 florian Exp $
  .\" converted to new format by deraadt@openbsd.org
  .\"
  .\" Copyright (c) 1993 by Adrian Mariano (adrian@cam.cornell.edu)
***************
*** 16,22 ****
  .\" I would appreciate (though I do not require) receiving a copy of any
  .\" improvements you might make to this program.
  .\"
! .Dd $Mdocdate: February 18 2022 $
  .Dt UNITS 1
  .Os
  .Sh NAME
--- 16,22 ----
  .\" I would appreciate (though I do not require) receiving a copy of any
  .\" improvements you might make to this program.
  .\"
! .Dd $Mdocdate: December 26 2022 $
  .Dt UNITS 1
  .Os
  .Sh NAME
***************
*** 79,84 ****
--- 79,89 ----
  .Bl -tag -width Ds
  .It Fl f Ar filename
  Specifies the name of the units data file to load.
+ This option may be specified multiple times.
+ The standard units library is read if
+ .Ar filename
+ is the empty string.
+ This allows extending the standard units library with a personal library.
  .It Fl q
  Suppresses prompting of the user for units and the display of statistics
  about the number of units loaded.