Description: Clarify units in paps man page

Bug-Debian: http://bugs.debian.org/365820

--- a/src/paps.1

+++ b/src/paps.1

@@ -43,17 +43,20 @@

 .B \-\-paper ps

 Choose paper size. Known paper sizes are legal, letter, a4. Default is A4.

 .TP

+.B Postscript points

+Each postscript point equals to 1/72 of an inch. 36 points are 1/2 of an inch.

+.TP

 .B \-\-bottom-margin=bm

-Set bottom margin in postscript points (1/72 inch). Default is 36.

+Set bottom margin. Default is 36 postscript points.

 .TP

 .B \-\-top-margin=tm

-Set top margin. Default is 36.

+Set top margin. Default is 36 postscript points.

 .TP

 .B \-\-left-margin=lm

-Set left margin. Default is 36.

+Set left margin. Default is 36 postscript points.

 .TP

 .B \-\-right-margin=rm

-Set right margin. Default is 36.

+Set right margin. Default is 36 postscript points.

 .TP

 .B \-\-help

 Show summary of options.