Help/guide/tutorial: Revert "require C++14 for the Tutorial"

Revert the changes from commit a2a90f41e3 (Tests: require C++14 for the
Tutorial, 2019-03-21, v3.15.0-rc1~41^2~2) for the content in its new
home.  In commit d50b31be35 (Clang: For MSVC ABI do not use modes older
than C++14, 2019-07-23) we fixed the C++ standard selection for GNU-like
Clang with the MSVC ABI so the test code itself no longer needs to do
it.  In particular, changing the tests in this way broke the tutorial's
narrative.

12 files changed, 24 insertions, 12 deletions

diff --git a/Help/guide/tutorial/Complete/CMakeLists.txt b/Help/guide/tutorial/Complete/CMakeLists.txt
index e84f932..bea611c 100644
--- a/Help/guide/tutorial/Complete/CMakeLists.txt
+++ b/Help/guide/tutorial/Complete/CMakeLists.txt
@@ -1,7 +1,8 @@
 cmake_minimum_required(VERSION 3.3)
 project(Tutorial)
 
-set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
 
 # set the version number
 set(Tutorial_VERSION_MAJOR 1)
diff --git a/Help/guide/tutorial/Consumer/CMakeLists.txt b/Help/guide/tutorial/Consumer/CMakeLists.txt
index 5097917..4033b4d 100644
--- a/Help/guide/tutorial/Consumer/CMakeLists.txt
+++ b/Help/guide/tutorial/Consumer/CMakeLists.txt
@@ -1,7 +1,8 @@
 cmake_minimum_required(VERSION 3.3)
 
 if(NOT DEFINED CMAKE_CXX_STANDARD)
-  set(CMAKE_CXX_STANDARD 14)
+  set(CMAKE_CXX_STANDARD 11)
+  set(CMAKE_CXX_STANDARD_REQUIRED True)
 endif()
 
 
diff --git a/Help/guide/tutorial/Step10/CMakeLists.txt b/Help/guide/tutorial/Step10/CMakeLists.txt
index 5819272..25bc0c1 100644
--- a/Help/guide/tutorial/Step10/CMakeLists.txt
+++ b/Help/guide/tutorial/Step10/CMakeLists.txt
@@ -1,7 +1,8 @@
 cmake_minimum_required(VERSION 3.3)
 project(Tutorial)
 
-set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
 
 # Set the version number
 set(Tutorial_VERSION_MAJOR 1)
diff --git a/Help/guide/tutorial/Step11/CMakeLists.txt b/Help/guide/tutorial/Step11/CMakeLists.txt
index 2e5cb15..8f29fe2 100644
--- a/Help/guide/tutorial/Step11/CMakeLists.txt
+++ b/Help/guide/tutorial/Step11/CMakeLists.txt
@@ -1,7 +1,8 @@
 cmake_minimum_required(VERSION 3.3)
 project(Tutorial)
 
-set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
 
 # set the version number
 set(Tutorial_VERSION_MAJOR 1)
diff --git a/Help/guide/tutorial/Step2/CMakeLists.txt b/Help/guide/tutorial/Step2/CMakeLists.txt
index 1f43b2b..059b89a 100644
--- a/Help/guide/tutorial/Step2/CMakeLists.txt
+++ b/Help/guide/tutorial/Step2/CMakeLists.txt
@@ -1,7 +1,8 @@
 cmake_minimum_required(VERSION 3.3)
 project(Tutorial)
 
-set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
 
 # set the version number
 set(Tutorial_VERSION_MAJOR 1)
diff --git a/Help/guide/tutorial/Step3/CMakeLists.txt b/Help/guide/tutorial/Step3/CMakeLists.txt
index 966c38a..9804abf 100644
--- a/Help/guide/tutorial/Step3/CMakeLists.txt
+++ b/Help/guide/tutorial/Step3/CMakeLists.txt
@@ -1,7 +1,8 @@
 cmake_minimum_required(VERSION 3.3)
 project(Tutorial)
 
-set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
 
 # should we use our own math functions
 option(USE_MYMATH "Use tutorial provided math implementation" ON)
diff --git a/Help/guide/tutorial/Step4/CMakeLists.txt b/Help/guide/tutorial/Step4/CMakeLists.txt
index a157bda..0ae2648 100644
--- a/Help/guide/tutorial/Step4/CMakeLists.txt
+++ b/Help/guide/tutorial/Step4/CMakeLists.txt
@@ -1,7 +1,8 @@
 cmake_minimum_required(VERSION 3.3)
 project(Tutorial)
 
-set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
 
 # should we use our own math functions
 option(USE_MYMATH "Use tutorial provided math implementation" ON)
diff --git a/Help/guide/tutorial/Step5/CMakeLists.txt b/Help/guide/tutorial/Step5/CMakeLists.txt
index 76b9179..dac9b45 100644
--- a/Help/guide/tutorial/Step5/CMakeLists.txt
+++ b/Help/guide/tutorial/Step5/CMakeLists.txt
@@ -1,7 +1,8 @@
 cmake_minimum_required(VERSION 3.3)
 project(Tutorial)
 
-set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
 
 # should we use our own math functions
 option(USE_MYMATH "Use tutorial provided math implementation" ON)
diff --git a/Help/guide/tutorial/Step6/CMakeLists.txt b/Help/guide/tutorial/Step6/CMakeLists.txt
index 5829891..1465e46 100644
--- a/Help/guide/tutorial/Step6/CMakeLists.txt
+++ b/Help/guide/tutorial/Step6/CMakeLists.txt
@@ -1,7 +1,8 @@
 cmake_minimum_required(VERSION 3.3)
 project(Tutorial)
 
-set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
 
 # set the version number
 set(Tutorial_VERSION_MAJOR 1)
diff --git a/Help/guide/tutorial/Step7/CMakeLists.txt b/Help/guide/tutorial/Step7/CMakeLists.txt
index 17e6a60..a1efa77 100644
--- a/Help/guide/tutorial/Step7/CMakeLists.txt
+++ b/Help/guide/tutorial/Step7/CMakeLists.txt
@@ -1,7 +1,8 @@
 cmake_minimum_required(VERSION 3.3)
 project(Tutorial)
 
-set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
 
 # set the version number
 set(Tutorial_VERSION_MAJOR 1)
diff --git a/Help/guide/tutorial/Step8/CMakeLists.txt b/Help/guide/tutorial/Step8/CMakeLists.txt
index 86725e8..a0316a0 100644
--- a/Help/guide/tutorial/Step8/CMakeLists.txt
+++ b/Help/guide/tutorial/Step8/CMakeLists.txt
@@ -1,7 +1,8 @@
 cmake_minimum_required(VERSION 3.3)
 project(Tutorial)
 
-set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
 
 # set the version number
 set(Tutorial_VERSION_MAJOR 1)
diff --git a/Help/guide/tutorial/Step9/CMakeLists.txt b/Help/guide/tutorial/Step9/CMakeLists.txt
index 07ab90a..e610b99 100644
--- a/Help/guide/tutorial/Step9/CMakeLists.txt
+++ b/Help/guide/tutorial/Step9/CMakeLists.txt
@@ -1,7 +1,8 @@
 cmake_minimum_required(VERSION 3.3)
 project(Tutorial)
 
-set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
 
 # set the version number
 set(Tutorial_VERSION_MAJOR 1)