Merge branch 'doc-cxx-std-msvc' into release-3.10

Merge-request: !1401

Help/prop_tgt/CXX_STANDARD.rst

@@ -6,7 +6,8 @@ The C++ standard whose features are requested to build this target.
 This property specifies the C++ standard whose features are requested
 to build this target.  For some compilers, this results in adding a
 flag such as ``-std=gnu++11`` to the compile line.  For compilers that
-have no notion of a standard level, such as MSVC, this has no effect.
+have no notion of a standard level, such as Microsoft Visual C++ before
+2015 Update 3, this has no effect.
 
 Supported values are ``98``, ``11``, ``14``, and ``17``.
 

Help/prop_tgt/C_STANDARD.rst

@@ -6,7 +6,8 @@ The C standard whose features are requested to build this target.
 This property specifies the C standard whose features are requested
 to build this target.  For some compilers, this results in adding a
 flag such as ``-std=gnu11`` to the compile line.  For compilers that
-have no notion of a standard level, such as MSVC, this has no effect.
+have no notion of a standard level, such as Microsoft Visual C++ before
+2015 Update 3, this has no effect.
 
 Supported values are ``90``, ``99`` and ``11``.