emphasize and oddball nuance of LaTeX comment syntax

Doc/doc/doc.tex

@@ -295,10 +295,10 @@ This sentence has a footnote reference.%
     to know about \LaTeX{} syntax.
 
     A \dfn{comment} is started by the ``percent'' character
-    (\character{\%}) and continues through the end of the line and all
-    leading whitespace on the following line.  This is a little
-    different from any programming language I know of, so an example
-    is in order:
+    (\character{\%}) and continues through the end of the line
+    \emph{and all leading whitespace on the following line}.  This is
+    a little different from any programming language I know of, so an
+    example is in order:
 
 \begin{verbatim}
 This is text.% comment