Remove erroneous period.
diff --git a/Doc/lib/libunittest.tex b/Doc/lib/libunittest.tex
index 2d710e8..9feba2f 100644
--- a/Doc/lib/libunittest.tex
+++ b/Doc/lib/libunittest.tex
@@ -298,7 +298,7 @@
\begin{itemize}
\item The test module can be run standalone from the command line.
\item The test code can more easily be separated from shipped code.
- \item There is less temptation to change test code to fit the code.
+ \item There is less temptation to change test code to fit the code
it tests without a good reason.
\item Test code should be modified much less frequently than the
code it tests.