Tutorial: Improve Step 1

* Update minimum required version to 3.10
* Use VERSION argument to project command rather than separate variables
* Replace `endif(USE_MYMATH)` with  more modern `endif()`
* Simplify the call to 'configure_file()'
* Add comments to tutorial.cxx to use as anchors in documentation
* Remove CMakeLists and TutorialConfig.h.in files that users should
  create. Consequently, remove Step1 from CMake tests.

2 files changed, 6 insertions, 9 deletions

diff --git a/Help/guide/tutorial/MultiPackage/CMakeLists.txt b/Help/guide/tutorial/MultiPackage/CMakeLists.txt
index bea611c..f588820 100644
--- a/Help/guide/tutorial/MultiPackage/CMakeLists.txt
+++ b/Help/guide/tutorial/MultiPackage/CMakeLists.txt
@@ -1,12 +1,11 @@
-cmake_minimum_required(VERSION 3.3)
-project(Tutorial)
+cmake_minimum_required(VERSION 3.10)
+
+# set the project name and version
+project(Tutorial VERSION 1.0)
 
 set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED True)
 
-# set the version number
-set(Tutorial_VERSION_MAJOR 1)
-set(Tutorial_VERSION_MINOR 0)
 
 # control where the static and shared libraries are built so that on windows
 # we don't need to tinker with the path to run the executable
@@ -23,10 +22,7 @@ elseif(UNIX)
 endif()
 
 # configure a header file to pass the version number only
-configure_file(
-  "${PROJECT_SOURCE_DIR}/TutorialConfig.h.in"
-  "${PROJECT_BINARY_DIR}/TutorialConfig.h"
-  )
+configure_file(TutorialConfig.h.in TutorialConfig.h)
 
 # add the MathFunctions library
 add_subdirectory(MathFunctions)
diff --git a/Help/guide/tutorial/MultiPackage/tutorial.cxx b/Help/guide/tutorial/MultiPackage/tutorial.cxx
index 4451cbd..ddc6364 100644
--- a/Help/guide/tutorial/MultiPackage/tutorial.cxx
+++ b/Help/guide/tutorial/MultiPackage/tutorial.cxx
@@ -15,6 +15,7 @@ int main(int argc, char* argv[])
     return 1;
   }
 
+  // convert input to double
   double inputValue = std::stod(argv[1]);
 
   const double outputValue = mathfunctions::sqrt(inputValue);