Corrected typo.

docs/report.tex

@@ -59,7 +59,7 @@ mechanism. To test the definition, a reference implementation is written in
 Python.
 
 % Setting
-To tests multi-touch interaction properly, a multi-touch device is required.
+To test multi-touch interaction properly, a multi-touch device is required.
 The University of Amsterdam (UvA) has provided access to a multi-touch table
 from PQlabs. The table uses the TUIO
 protocol\footnote{\url{http://www.tuio.org/}} to communicate touch events.