Organize and document source code

1 files changed, 20 insertions, 8 deletions

diff --git a/example.t b/example.t
index 1ea01b1..bee06da 100644
--- a/example.t
+++ b/example.t
@@ -13,14 +13,16 @@ Introduction
 .i Mg
 is a simple macro package for troff with the following features:
 .p
-1.	It is designed to be easy to understand and to customize
+1.	\c
+It is designed to be easy to understand and to customize
 by editing the source code.
 .p
-2.	It makes use of the extended support for environments
-offered by many modern troff implementations
-(but it can be made compatible with the original troff if need be).
+2.	\c
+It makes use of the extended support for environments
+offered by many modern troff implementations.
 .p
-3.	It is designed to be practically easy to use.
+3.	\c
+It is designed to be practically easy to use.
 Macros are consistently one letter long and written in lowercase.
 .p
 While
@@ -53,7 +55,7 @@ If the user wishes to modify the default font size,
 he or she can simply switch to the
 .i p
 environment and set the font size as desired:
-.c
+.l
 .eo
 .cc ,
 .\" set heading font
@@ -76,7 +78,7 @@ are applied to all
 environments.
 It is thus remarkably simple and intuitive to set,
 for example, the default font of a document:
-.c
+.l
 .cc ,
 .fam N
 .t
@@ -85,4 +87,14 @@ Document title
 First paragraph.
 ,cc
 .p
-\&...
+In addition to the normal environment-relevant settings,
+.i mg
+manually associates a few special registers with the current environment:
+.p
+1.	\c
+.c sp ,
+the amount of vertical space to add before environment.
+.p
+2.	\c
+.c ti ,
+the indentation of the first line in the environment.