Fix minor markup nits.
diff --git a/Doc/ref/ref6.tex b/Doc/ref/ref6.tex
index 4cf30ff..13b1c71 100644
--- a/Doc/ref/ref6.tex
+++ b/Doc/ref/ref6.tex
@@ -657,7 +657,7 @@
expression should evaluate to either a string, an open file object, or
a code object. If it is a string, the string is parsed as a suite of
Python statements which is then executed (unless a syntax error
-occurs). If it is an open file, the file is parsed until EOF and
+occurs). If it is an open file, the file is parsed until \EOF{} and
executed. If it is a code object, it is simply executed.
In all cases, if the optional parts are omitted, the code is executed