docs: fix capitalization in doxygen comments

Change-Id: Ibf5ee5119d12d60d382b0acef8dfd08277c18fcb
diff --git a/tests/daemon/fw/strategy-tester.hpp b/tests/daemon/fw/strategy-tester.hpp
index e8e795a..e7dcccc 100644
--- a/tests/daemon/fw/strategy-tester.hpp
+++ b/tests/daemon/fw/strategy-tester.hpp
@@ -68,11 +68,11 @@
     return name;
   }
 
-  /** \brief Signal emitted after each action
+  /** \brief Signal emitted after each action.
    */
   signal::Signal<StrategyTester<S>> afterAction;
 
-  /** \brief execute f and wait for a number of strategy actions
+  /** \brief Execute f and wait for a number of strategy actions.
    *  \note The actions may occur either during f() invocation or afterwards.
    *  \return whether expected number of actions have occurred
    */