Markup consistency.

Using \input instead of \include to avoid extra .aux files from being
generated.

Doc/ref/ref.tex

@@ -16,40 +16,40 @@
 
 \noindent
 Python is a simple, yet powerful, interpreted programming language
-that bridges the gap between C and shell programming, and is thus
+that bridges the gap between \C{} and shell programming, and is thus
 ideally suited for ``throw-away programming'' and rapid prototyping.
 Its syntax is put together from constructs borrowed from a variety of
-other languages; most prominent are influences from ABC, C, Modula-3
+other languages; most prominent are influences from \ABC, \C, Modula-3
 and Icon.
 
 The Python interpreter is easily extended with new functions and data
-types implemented in C.  Python is also suitable as an extension
+types implemented in \C{}.  Python is also suitable as an extension
 language for highly customizable C applications such as editors or
 window managers.
 
 Python is available for various operating systems, amongst which
-several flavors of {\UNIX} (including Linux), the Apple Macintosh O.S.,
+several flavors of \UNIX{} (including Linux), the Apple Macintosh O.S.,
 MS-DOS, MS-Windows 3.1, Windows NT, and OS/2.
 
 This reference manual describes the syntax and ``core semantics'' of
 the language.  It is terse, but attempts to be exact and complete.
 The semantics of non-essential built-in object types and of the
-built-in functions and modules are described in the {\em Python
+built-in functions and modules are described in the \emph{Python
 Library Reference}.  For an informal introduction to the language, see
-the {\em Python Tutorial}.
+the \emph{Python Tutorial}.
 
 \end{abstract}
 
 \tableofcontents
 
-\include{ref1}		% Introduction
-\include{ref2}		% Lexical analysis
-\include{ref3}		% Data model
-\include{ref4}		% Execution model
-\include{ref5}		% Expressions and conditions
-\include{ref6}		% Simple statements
-\include{ref7}		% Compound statements
-\include{ref8}		% Top-level components
+\input{ref1}		% Introduction
+\input{ref2}		% Lexical analysis
+\input{ref3}		% Data model
+\input{ref4}		% Execution model
+\input{ref5}		% Expressions and conditions
+\input{ref6}		% Simple statements
+\input{ref7}		% Compound statements
+\input{ref8}		% Top-level components
 
 \input{ref.ind}