Fix grammar and spelling.
## This file should be placed in the root directory of your project.
## Then modify the CMakeLists.txt file in the root directory of your
## project to incorporate the testing dashboard.
-## # The following are required to uses Dart and the Cdash dashboard
+## # The following are required to use Dart and the CDash dashboard.
## ENABLE_TESTING()
## INCLUDE(Dart)
