1.1 --- a/ch01.roff	Fri Apr 20 17:06:58 2012 +0200
     1.2 +++ b/ch01.roff	Fri Apr 20 19:14:30 2012 +0200
     1.3 @@ -22,7 +22,7 @@
     1.4  had in spirit remained so. This is similar to Unix, which much less
     1.5  is a specific software product, as it is a style of system design.
     1.6  
     1.7 -.H2 "History" no
     1.8 +.U2 "History
     1.9  .P
    1.10  MH is an electronic mail system, originating in the RAND Corporation.
    1.11  In 1977, Norman Shapiro and Stockton Gaines had proposed the design
    1.12 @@ -64,7 +64,7 @@
    1.13  principle concepts in a more modern way. This version of MH is the
    1.14  subject of this thesis.
    1.15  
    1.16 -.H2 "Concepts" no
    1.17 +.U2 "Concepts
    1.18  .P
    1.19  MH is a toolchest, modelled after the Unix toolchest. It consists of a
    1.20  bunch of tools, each covering one task of email handling. These programs