Fix a very minor (but annoying when looking for things!) markup nit.

Doc/ref/ref1.tex

@@ -33,6 +33,7 @@ standard modules.  These are not documented here, but in the separate
 built-in modules are mentioned when they interact in a significant way
 with the language definition.
 
+
 \section{Notation\label{notation}}
 
 The descriptions of lexical analysis and syntax use a modified BNF

Doc/ref/ref3.tex

@@ -1,5 +1,6 @@
 \chapter{Data model\label{datamodel}}
 
+
 \section{Objects, values and types\label{objects}}
 
 \dfn{Objects} are Python's abstraction for data.  All data in a Python
@@ -95,6 +96,7 @@ lists.
 (Note that \samp{c = d = []} assigns the same object to both
 \code{c} and \code{d}.)
 
+
 \section{The standard type hierarchy\label{types}}
 
 Below is a list of the types that are built into Python.  Extension

Doc/ref/ref4.tex

@@ -1,6 +1,7 @@
 \chapter{Execution model \label{execmodel}}
 \index{execution model}
 
+
 \section{Code blocks, execution frames, and namespaces \label{execframes}}
 \index{code block}
 \index{namespace}

Doc/ref/ref5.tex

@@ -16,6 +16,7 @@ and no semantics are given, the semantics of this form of \code{name}
 are the same as for \code{othername}.
 \index{syntax}
 
+
 \section{Arithmetic conversions\label{conversions}}
 \indexii{arithmetic}{conversion}
 
@@ -54,6 +55,7 @@ atom:      identifier | literal | enclosure
 enclosure: parenth_form|list_display|dict_display|string_conversion
 \end{verbatim}
 
+
 \subsection{Identifiers (Names)\label{atom-identifiers}}
 \index{name}
 \index{identifier}
@@ -99,6 +101,7 @@ transformed name is extremely long (longer than 255 characters),
 implementation defined truncation may happen.  If the class name
 consists only of underscores, no transformation is done.
 
+
 \subsection{Literals\label{atom-literals}}
 \index{literal}
 
@@ -122,6 +125,7 @@ the same object or a different object with the same value.
 \indexiii{immutable}{data}{type}
 \indexii{immutable}{object}
 
+
 \subsection{Parenthesized forms\label{parenthesized}}
 \index{parenthesized form}
 
@@ -150,6 +154,7 @@ pass uncaught.
 \index{comma}
 \indexii{tuple}{display}
 
+
 \subsection{List displays\label{lists}}
 \indexii{list}{display}
 \indexii{list}{comprehensions}
@@ -181,6 +186,7 @@ each time the innermost block is reached.
 \obindex{list}
 \indexii{empty}{list}
 
+
 \subsection{Dictionary displays\label{dict}}
 \indexii{dictionary}{display}
 
@@ -210,6 +216,7 @@ are not detected; the last datum (textually rightmost in the display)
 stored for a given key value prevails.
 \indexii{immutable}{object}
 
+
 \subsection{String conversions\label{string-conversions}}
 \indexii{string}{conversion}
 \indexii{reverse}{quotes}
@@ -249,6 +256,7 @@ similar but more user-friendly conversion.
 \bifuncindex{repr}
 \bifuncindex{str}
 
+
 \section{Primaries\label{primaries}}
 \index{primary}
 
@@ -259,6 +267,7 @@ Their syntax is:
 primary:        atom | attributeref | subscription | slicing | call
 \end{verbatim}
 
+
 \subsection{Attribute references\label{attribute-references}}
 \indexii{attribute}{reference}
 
@@ -279,6 +288,7 @@ yield different objects.
 \obindex{module}
 \obindex{list}
 
+
 \subsection{Subscriptions\label{subscriptions}}
 \index{subscription}
 
@@ -316,6 +326,7 @@ type but a string of exactly one character.
 \index{character}
 \indexii{string}{item}
 
+
 \subsection{Slicings\label{slicings}}
 \index{slicing}
 \index{slice}
@@ -382,6 +393,7 @@ expressions.
 \withsubitem{(slice object attribute)}{\ttindex{start}
   \ttindex{stop}\ttindex{step}}
 
+
 \subsection{Calls\label{calls}}
 \index{call}
 
@@ -556,6 +568,7 @@ In all three cases, if the argument does not have the proper type,
 a \exception{TypeError} exception is raised.
 \exindex{TypeError}
 
+
 \section{Binary arithmetic operations\label{binary}}
 \indexiii{binary}{arithmetic}{operation}
 
@@ -626,6 +639,7 @@ arguments.  The numeric arguments are first converted to a common
 type.
 \index{subtraction}
 
+
 \section{Shifting operations\label{shifting}}
 \indexii{shifting}{operation}
 
@@ -650,6 +664,7 @@ value.  Negative shift counts raise a \exception{ValueError}
 exception.
 \exindex{ValueError}
 
+
 \section{Binary bit-wise operations\label{bitwise}}
 \indexiii{binary}{bit-wise}{operation}
 
@@ -678,6 +693,7 @@ converted to a common type.
 \indexii{bit-wise}{or}
 \indexii{inclusive}{or}
 
+
 \section{Comparisons\label{comparisons}}
 \index{comparison}
 
@@ -808,6 +824,7 @@ truth value.
 \opindex{is not}
 \indexii{identity}{test}
 
+
 \section{Boolean operations\label{Booleans}}
 \indexii{Boolean}{operation}
 

Doc/ref/ref6.tex

@@ -22,6 +22,7 @@ simple_stmt:    expression_stmt
               | exec_stmt
 \end{verbatim}
 
+
 \section{Expression statements \label{exprstmts}}
 \indexii{expression}{statement}
 
@@ -52,6 +53,7 @@ any output.)
 \indexii{writing}{values}
 \indexii{procedure}{call}
 
+
 \section{Assert statements \label{assert}}
 
 Assert statements\stindex{assert} are a convenient way to insert
@@ -89,6 +91,7 @@ it will be displayed as part of the stack trace.
 Assignments to \code{__debug__} are illegal.  The value for the
 built-in variable is determined when the interpreter starts.
 
+
 \section{Assignment statements \label{assignment}}
 
 Assignment statements\indexii{assignment}{statement} are used to
@@ -306,6 +309,7 @@ def f(arg): pass    # a function that does nothing (yet)
 class C: pass       # a class with no methods (yet)
 \end{verbatim}
 
+
 \section{The \keyword{del} statement \label{del}}
 \stindex{del}
 
@@ -334,6 +338,7 @@ is in general equivalent to assignment of an empty slice of the
 right type (but even this is determined by the sliced object).
 \indexii{attribute}{deletion}
 
+
 \section{The \keyword{print} statement \label{print}}
 \stindex{print}
 
@@ -385,6 +390,7 @@ the subsequent expressions are printed to this file object.  If the
 first expression evaluates to \code{None}, then \code{sys.stdout} is
 used as the file for output.
 
+
 \section{The \keyword{return} statement \label{return}}
 \stindex{return}
 
@@ -408,6 +414,7 @@ with a \keyword{finally} clause, that \keyword{finally} clause is executed
 before really leaving the function.
 \kwindex{finally}
 
+
 \section{The \keyword{raise} statement \label{raise}}
 \stindex{raise}
 
@@ -448,6 +455,7 @@ exception occurred.  This is useful to re-raise an exception
 transparently in an except clause.
 \obindex{traceback}
 
+
 \section{The \keyword{break} statement \label{break}}
 \stindex{break}
 
@@ -475,6 +483,7 @@ with a \keyword{finally} clause, that \keyword{finally} clause is executed
 before really leaving the loop.
 \kwindex{finally}
 
+
 \section{The \keyword{continue} statement \label{continue}}
 \stindex{continue}
 
@@ -494,6 +503,7 @@ It continues with the next cycle of the nearest enclosing loop.
 \indexii{loop}{statement}
 \kwindex{finally}
 
+
 \section{The \keyword{import} statement \label{import}}
 \stindex{import}
 
@@ -594,6 +604,7 @@ about how the module search works from inside a package.]
 [XXX Also should mention __import__().]
 \bifuncindex{__import__}
 
+
 \section{The \keyword{global} statement \label{global}}
 \stindex{global}
 
@@ -634,6 +645,7 @@ containing the \keyword{exec} statement.  The same applies to the
 \bifuncindex{execfile}
 \bifuncindex{compile}
 
+
 \section{The \keyword{exec} statement \label{exec}}
 \stindex{exec}
 

Doc/ref/ref7.tex

@@ -60,6 +60,7 @@ statement, thus there are no ambiguities (the `dangling
 The formatting of the grammar rules in the following sections places
 each clause on a separate line for clarity.
 
+
 \section{The \keyword{if} statement\label{if}}
 \stindex{if}
 
@@ -80,6 +81,7 @@ present, is executed.
 \kwindex{elif}
 \kwindex{else}
 
+
 \section{The \keyword{while} statement\label{while}}
 \stindex{while}
 \indexii{loop}{statement}
@@ -105,6 +107,7 @@ of the suite and goes back to testing the expression.
 \stindex{break}
 \stindex{continue}
 
+
 \section{The \keyword{for} statement\label{for}}
 \stindex{for}
 \indexii{loop}{statement}
@@ -169,6 +172,7 @@ for x in a[:]:
     if x < 0: a.remove(x)
 \end{verbatim}
 
+
 \section{The \keyword{try} statement\label{try}}
 \stindex{try}
 
@@ -278,6 +282,7 @@ restriction may be lifted in the future).
 \stindex{break}
 \stindex{continue}
 
+
 \section{Function definitions\label{function}}
 \indexii{function}{definition}
 
@@ -368,6 +373,7 @@ passed around.  The semantics of name resolution in the nested
 function will change in Python 2.2.  See the appendix for a
 description of the new semantics.
 
+
 \section{Class definitions\label{class}}
 \indexii{class}{definition}
 

Doc/ref/ref8.tex

@@ -6,6 +6,7 @@ typed in interactively, from a module source file, etc.  This chapter
 gives the syntax used in these cases.
 \index{interpreter}
 
+
 \section{Complete Python programs\label{programs}}
 \index{program}
 
@@ -43,6 +44,7 @@ program.
 \index{command line}
 \index{standard input}
 
+
 \section{File input\label{file-input}}
 
 All input read from non-interactive files has the same form:
@@ -63,6 +65,7 @@ This syntax is used in the following situations:
 
 \end{itemize}
 
+
 \section{Interactive input\label{interactive}}
 
 Input in interactive mode is parsed using the following grammar:
@@ -75,6 +78,7 @@ Note that a (top-level) compound statement must be followed by a blank
 line in interactive mode; this is needed to help the parser detect the
 end of the input.
 
+
 \section{Expression input\label{expression-input}}
 \index{input}