Merge topic 'reword_MSVC_documentation'

1185438ea8 Help: Reword the MSVC variable documentation focusing on cl.exe compatibility

Acked-by: Kitware Robot <[email protected]>
Merge-request: !5676

Help/variable/MSVC.rst

@@ -1,8 +1,7 @@
 MSVC
 ----
 
-Set to ``true`` when the compiler is some version of Microsoft Visual
-C++ or another compiler simulating Visual C++.  Any compiler defining
-``_MSC_VER`` is considered simulating Visual C++.
+Set to ``true`` when the compiler is some version of Microsoft Visual C++
+or another compiler simulating the Visual C++ ``cl`` command-line syntax.
 
 See also the :variable:`MSVC_VERSION` variable.