Fix a very minor (but annoying when looking for things!) markup nit.
diff --git a/Doc/ref/ref8.tex b/Doc/ref/ref8.tex
index cadbc5d..24d10b1 100644
--- a/Doc/ref/ref8.tex
+++ b/Doc/ref/ref8.tex
@@ -6,6 +6,7 @@
gives the syntax used in these cases.
\index{interpreter}
+
\section{Complete Python programs\label{programs}}
\index{program}
@@ -43,6 +44,7 @@
\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 @@
\end{itemize}
+
\section{Interactive input\label{interactive}}
Input in interactive mode is parsed using the following grammar:
@@ -75,6 +78,7 @@
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}