Fix another not nice apostrophe (FS#11296)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26170 a1c6a512-1295-4272-9138-f99709370657
diff --git a/manual/advanced_topics/viewports/mono-vp-syntax.tex b/manual/advanced_topics/viewports/mono-vp-syntax.tex
index bb015a3..c1ff046 100644
--- a/manual/advanced_topics/viewports/mono-vp-syntax.tex
+++ b/manual/advanced_topics/viewports/mono-vp-syntax.tex
@@ -3,7 +3,7 @@
 \config{\%V{\textbar}x{\textbar}y{\textbar}[width]{\textbar}[height]{\textbar}[font]{\textbar}}%
 
     \begin{itemize}
-      \item 'font' is a number - '0' is the built-in system font, '1' is the
+      \item `font' is a number: 0 is the built-in system font, 1 is the
       user-selected font.
       \item Only the coordinates \emph{have} to be specified. Leaving the other
       definitions blank will set them to their default values.