Backed out margin calculations in favour of much simpler rule of thumb:

margins are 1/9 the length/width.

1 files changed, 2 insertions, 4 deletions

diff --git a/mandoc.1 b/mandoc.1
index c26091d7..a4010cea 100644
--- a/mandoc.1
+++ b/mandoc.1
@@ -303,10 +303,8 @@ PostScript
 Level-2 pages may be generated by
 .Fl T Ns Cm ps .
 Output pages default to letter sized and are rendered in the Times font
-family, 11-point.  Margins are calculated as the maximum of either space
-left by page width minus text width (65
-.Sq m
-characters), or given default margins of 2 cm.
+family, 11-point.
+Margins are calculated as 1/9 the page length and width.
 .Pp
 Special characters are rendered as in
 .Sx ASCII Output .