Minor fixes in the README

Author: Felipe Torrezan

README.md

@@ -97,7 +97,7 @@ cmake --build .
 ## Run
 Let's test the application. To run the executable you will need the non-interactive[^3] command line interface for the IAR C-SPY Debugger (`cspybat`) with the proper drivers for the desired target. Amongst the many ways of accomplishing this, let's take advantage of the `add_test()` for testing the application in a Arm Cortex-M4 simulated target.
 
- In this example we will use Arm. To do so, we need to change the Tutorial's `CMakeLists.txt`:
+ In this example we will use Arm. To do so, you need to change the Tutorial's `CMakeLists.txt`:
 - Firstly add [`enable_testing()`](https://cmake.org/cmake/help/latest/command/enable_testing.html#command:enable_testing) to enable testing:
 ```cmake
 enable_testing()
@@ -119,7 +119,7 @@ add_test(NAME tutorialTest
            --semihosting)
 ```
 
-- Now use the [`PASS_REGULAR_EXPRESSION`](https://cmake.org/cmake/help/latest/prop_test/PASS_REGULAR_EXPRESSION.html#prop_test:PASS_REGULAR_EXPRESSION) test property to validate if the program emits the expected string to the standard output (`stdout`). In this case, verifying that the usage message is printed when an incorrect number of arguments is provided.
+- Now use the [`PASS_REGULAR_EXPRESSION`](https://cmake.org/cmake/help/latest/prop_test/PASS_REGULAR_EXPRESSION.html#prop_test:PASS_REGULAR_EXPRESSION) test property to validate if the program emits the expected string to the standard output (`stdout`). In this case, verifying that `printf()` prints the expected message.
 ```cmake
 set_tests_properties(tutorialTest PROPERTIES PASS_REGULAR_EXPRESSION "Hello world!")
 ```

tutorial/CMakeLists.txt

@@ -16,19 +16,10 @@ target_compile_options(tutorial PRIVATE --cpu=cortex-m4)
 # linker options
 target_link_options(tutorial PRIVATE --semihosting)
 
-enable_testing()
-
-add_test(NAME tutorialTest
-         COMMAND /opt/iarsystems/bxarm/common/bin/CSpyBat
-         # C-SPY drivers for the Arm simulator via command line interface
-         /opt/iarsystems/bxarm/arm/bin/libarmPROC.so
-         /opt/iarsystems/bxarm/arm/bin/libarmSIM2.so
-         --plugin=/opt/iarsystems/bxarm/arm/bin/libarmLibsupportUniversal.so
-         # The target executable (built with debug information)
-         --debug_file=$<TARGET_FILE:tutorial>
-         # C-SPY driver options
-         --backend
-           --cpu=cortex-m4
-           --semihosting)
-
-set_tests_properties(tutorialTest PROPERTIES PASS_REGULAR_EXPRESSION "Hello world!")
+# TODO 1: Enable testing in CMake
+
+# TODO 2: Add a test named `tutorialTest` for `tutorial` (hint: use CSpyBat)
+add_test()
+
+# TODO 3: Set the `tutorialTest` test passing condition
+set_tests_properties()