Adjust so that it works as part of a HOWTO-based manual.

Doc/libmac.tex

-\chapter{Macintosh Specific Services}
-\label{macintosh}
-
-The modules in this chapter are available on the Apple Macintosh only.
+The modules in this manual are available on the Apple Macintosh only.
 
 Aside from the modules described here there are also interfaces to
 various MacOS toolboxes, which are currently not extensively
@@ -124,7 +121,7 @@ values in MacPython.
 One additional function is available: \function{xstat()}. This function
 returns the same information as \function{stat()}, but with three extra
 values appended: the size of the resource fork of the file and its
-4-char creator and type.
+4-character creator and type.
 
 \section{Standard Module \module{macpath}}
 \label{module-macpath}

Doc/mac/libmac.tex

-\chapter{Macintosh Specific Services}
-\label{macintosh}
-
-The modules in this chapter are available on the Apple Macintosh only.
+The modules in this manual are available on the Apple Macintosh only.
 
 Aside from the modules described here there are also interfaces to
 various MacOS toolboxes, which are currently not extensively
@@ -124,7 +121,7 @@ values in MacPython.
 One additional function is available: \function{xstat()}. This function
 returns the same information as \function{stat()}, but with three extra
 values appended: the size of the resource fork of the file and its
-4-char creator and type.
+4-character creator and type.
 
 \section{Standard Module \module{macpath}}
 \label{module-macpath}