Note that the values for Boolean options are case-insensitive.
diff --git a/Doc/lib/libcfgparser.tex b/Doc/lib/libcfgparser.tex
index 591df2e..346ba8f 100644
--- a/Doc/lib/libcfgparser.tex
+++ b/Doc/lib/libcfgparser.tex
@@ -166,8 +166,9 @@
\var{section} to a Boolean value. Note that the accepted values
for the option are \code{1}, \code{yes}, \code{true}, and \code{on},
which cause this method to return true, and \code{0}, \code{no},
-\code{false}, and \code{off}, which cause it to return false. Any
-other value will cause it to raise \exception{ValueError}.
+\code{false}, and \code{off}, which cause it to return false. These
+values are checked in a case-insensitive manner. Any other value will
+cause it to raise \exception{ValueError}.
\end{methoddesc}
\begin{methoddesc}{set}{section, option, value}