- markup fix
- add clarifying words
diff --git a/Doc/ref/ref2.tex b/Doc/ref/ref2.tex
index 34e8a9e..5971dab 100644
--- a/Doc/ref/ref2.tex
+++ b/Doc/ref/ref2.tex
@@ -652,7 +652,7 @@
 \end{verbatim}
 
 Note that numeric literals do not include a sign; a phrase like
-\code{-1} is actually an expression composed of the operator
+\code{-1} is actually an expression composed of the unary operator
 \code{-} and the literal \code{1}.